Lower Your graphics card latency

germanjulian · Jul 21, 2004, 05:00 PM

UPDATE:
OK, the latency for the AGP bus for ATI cards is indeed 255! even when you select 32 in your BIOS.
if you search your registry for DisableProgPCILatency and change the value from 0 to 1 this will be changed on the next restart to 32!!!!
You can check your latency of all buses with this program:
http://www.transformerman1.plus.com/LtcyCfg.zip

What the author or the article below claims is that this fixes some stuttering in games but moreover get rids of audio popping and cracking issues, due to some devices taking up to much CPU time (high latency).
with the program you can also change the latency from 32 to another you desire (remeber it has to something which can be devided by 8).

Anyway I tested it only with Colin McRae 4 which I found stuttered very much for me (very little stutters) even though I had 50FPS. WIth this tweak the stutters are gone!

Never experienced stutters with other games before but hey it does not hurt graphics performance! (tested with 3dmark03).

anyway try it if you want:

http://www.transformerman1.plus.com/LtcyCfg.zip

Get the tool and see if your graphiccard is running at 248ms latency. Is it?

Decrease latency of it (or any other device with a latency, '000' means: has none) to 64 or below (below may not be faster, depends on system) and go into your favorite 3D game!

Any difference? I say YES and put my hands in fire for that.

Note that you can save the config it to a file (click 'add to list first' or it won't work) and load it via batch file (read me) when windows starts because otherwise windows will overwrite your settings with the next boot (JUST LIKE IT DOES WITH YOUR BIOS SETTINGS! GRMMF!)

Ok, to clear some things up.

1. The changes apply for AGP also!
2. You do not have to do it after every boot.

a) Start program and make the changes you want (enter number and click 'set now' for the device you want to change) - make sure you don't touch the devices that don't have 000 (no) latency at all
B) mark ALL entries and click on 'add to list', you will see a new column called 'new' on the right (means it's added)
C) press 'save as' and save the table to a config file with a name you like into the program folder I suggest
d) Go into the program folder, create a txt file and write into it:

C:\LtcyCfg\LtcyCfg.exe -f:C:\LtcyCfg\config.cfg <- Replace with your path and name of config file of course. (I think you could leave the folders away as the file resides in the same directory of the program, but I never trust windows in such cases)

Then save the txt-file and replace it's extension with BAT (if you can't see the extension you'll have to go to your windows-explorer->extras->folder options->somewhere...Google if you don't know and disable the 'hide extensions from known file types' or whatever it's called in the English version of XP)

e) Drag a shortcut of that BAT-file into your auto start folder

f) Done, if you want to make changes repeat step a-c. Happy gaming and more overall power (even on desktop)

3. Possible heat problem: I WOULD say no. Me and my friends (one doesn't even have a fan on his ATI!!!) didn't encounter any problems but only improvement of performance.

Let me try to explain why (simple words, I'm no technician):

Decreasing the latency does NOT mean INCREASING the response time of your hardware!

The BUS latency stands for: How much time does a component of your PC (graphic card, network card, and sound card) have to perform an operation before another component can! Note that only one component can use the BUS at one time, then the next, then the next. In other words: instead of letting your graphic card do 100 operations in 248ms you set it to a lower number of operations in 32, 64, 128ms. (32 is minimum and must be a number that

can be divided by 8)

So the problem is while leaving the graphic card latency at 248ms - which it is mostly set to - that the component has TOO MUCH time and other important operations (soundcard for example) can not be performed in time, so the queue list is getting bigger and bigger-> CPU overload.

Experiment a little with the settings and see what gets you best performance. In my opinion it's mostly the graphic card latency that hogs the CPU but you may tweak a little more out of it. Depends on hardware I guess. I have all my components set to 32ms now.

For more info go here: http://www.mark-knutson.com/technique_to_target_inc/ (Note that at this URL you'll find another program called PCIDAWG. It does exactly the same but has no possibility of loading it with windows, anyway the information you'll find there is pretty good. It's written by the programmer of PCIDAWG)

- - - - -
ADDED SOME MORE INFO:

Some of you might wonder why you have the "PCI Latency time" option in your BIOS if the PCI latency is messed up if you don't use a program like this one here.

1. Windows overwrites this setting. *Duh*
2. Some manufacturers of graphic cards and (possibly other hardware) set the latency of their cards to 248ms internally on the card itself (the programmer of PCIDAWG says that they do it to boost performance and that they are obviously wrong with that in most cases)

Who knows why they didn't play out THAT joker by now. ; )
- - - - -

One more thing: Don't blame me for a blown up card. I do not expect this to happen as I made only (and many) good experiences by tweaking these settings on many different PC systems. I tried to explain why hardware damage is probably never going to happen above BUT AT LAST: I'm no technician and no graphic card manufacturer.

also worth checking out is: http://www.nforcershq.com/forum/vie...er=asc&start=15

germanjulian · Jul 21, 2004, 05:04 PM

Quote:

From what I understand, AGP has it's own direct bus to the system. It is independant from the PCI bus (You can go check the agp specs).

This is why all AGP cards will have a latency of 248 (max), because there is No other devide which it shares with. There is only 1 AGP port and 1 AGP card so the AGP card should have the full lacenty timings.

So theoretically, changing the latency of AGP cards lower should not do anything at all.

From here on I'm babling and you can ignore or correct me if you're in the know.........................
For argument sake, you might say that though the AGP bus is independant, it still shares 'total system resource', and because of this, lowering the latency solves some stutter or tearing issue with graphics. I would agree with this, But this is just like underclocking.

The creator of PCIDAWG tool is basically doing it for PCI sound cards and addressing the problem of pops and crackles with sound.

I have previously owned many VIA boards from kt266-333 and have been following another PCI Latency 'guru', George Breese and his famous PCI Latency Patch. That also only modifies the latency for the PCI bus, solving issues with Sound, IDE and RAID and general stability.

Zelig · Jul 21, 2004, 06:21 PM

Nice links, I'm going to go read them now, and experiment a bit with my system...

MythicaL · Jul 21, 2004, 10:09 PM

Possible sticky? Looks awesome

SchwarzeFeen · Jul 21, 2004, 10:29 PM

Cannot wait to test this out!!! Can't believe i haven't seen this before?!

riles9262 · Jul 21, 2004, 11:58 PM

Nice find man

No_Style · Jul 22, 2004, 12:13 AM

Popping audio.. I stumbled across this before. It didn't do anything for me though.

Chilljf · Jul 23, 2004, 01:00 PM

Here is alot of info on agp latency & ways to change it. Most info discussed here is in this thread & solved. http://forums.pcper.com/showthread.php?t=326158 I found pci latency 32/agp latency 64 works best for me(dif clks work better for others, so try yourself). I do not suggest using powerstrip as I noticed it took 50% CPU when I clicked 3dmark & then proceeded to stay at 100% while the 3dmark window was open. You can use wpcredit to change the agp latency.
ATI Users -
All u have to do is Find "DisableProgPCILatency"= 0 & set it to 1 in registry. This will stop the ATI drivers from overiding your agp latency. Then use wpcredit to change
BUS#2 DEV#0 FUN#0

Offset: 0D
Default data: FF (248clk)

Change to:
32clk: 20
64clk: 40
128clk: 80
160clk : A0
192clk : C0
224clk : E0
255clk : FF

btw.. I dont know if nvidia card drivers override the agp latency.. if someone can test nvidia card & confirm

Here is a nice database of settings that can be changed from wpcredit. Thx tictac
************************
* nVidia nForce2 Data Base *
************************

1) AGP Controller Latency
*************************
PCI Bus#0 Dev#30 Func#0 Offset#0D

0D
- 16 clock : 10
- 32 clock : 20
- 64 clock : 40
- 96 clock : 60
- 128 clock : 80
- 160 clock : A0
- 192 clock : C0
- 224 clock : E0
- 255 clock : FF

2) AGP Bus Latency
******************
PCI Bus#0 Dev#30 Func#0 Offset#1B

1B
- 16 clock : 10
- 32 clock : 20
- 64 clock : 40
- 96 clock : 60
- 128 clock : 80
- 160 clock : A0
- 192 clock : C0
- 224 clock : E0
- 255 clock : FF

3) PCI Latency
*************
PCI Bus#0 Dev#8 Func#0 Offset#1B

1B
- 16 clock : 10
- 32 clock : 20
- 64 clock : 40
- 96 clock : 60
- 128 clock : 80
- 160 clock : A0
- 192 clock : C0
- 224 clock : E0
- 255 clock : FF

here are some more threads on it.. I posted it over month+ ago.. I thought I did here too, musta missed it..
http://www.nforcershq.com/forum/view...50182&start=15
http://www.rage3d.com/board/showthread.php?t=33764542

Chilljf · Jul 23, 2004, 01:16 PM

http://forums.pcper.com/showthread.php?t=337721
Here is a Windows Program from tictac (Abit Bios King) & CodeRed @ XtremeSystems.org allowing tweaking to all nForce2 base board on:

- Memory Alpha Timing
- AGP Controller Latency
- AGP Bus Latency
- PCI Latency

Here is some info on what Memory Alpha Timing is.. http://forums.pcper.com/showthread.php?t=335978

Alot of good things have been goin on wit Abit's NF7 because of alot of great guys & hard work/time modding bioses.. alot of peeps breaking 250 fsb with 2-2-2-11 1T .. Its a great mobo & will hold me over to nforce 4 chipset this winter

Chilljf · Jul 23, 2004, 01:37 PM

Quote:

Originally posted by No_Style
Popping audio.. I stumbled across this before. It didn't do anything for me though.

Not sure what mobo your using or soundcard, but a common cause of audio cracking/popping is from the south bridge overheating. Most southbridges dont come with heatsinks but it is a good idea to throw one on there. Abit had commented bout sound cracking problem w/southbridge heat & is now adding heatsinks to their new nf7

germanjulian · Jul 23, 2004, 03:22 PM

yeah that was more back in the kt333 days.. the popping sounds and sound card issues but some people still suffere from this

Chilljf · Jul 23, 2004, 03:44 PM

I see alot of people w/nforce2 mobo's that have sound cracking. Some users have been able to find fixes depending upon their case, but some none. http://forum.abit-usa.com/showthread...g&pagenumber=1

yea alot of kt333 users had problems with sound blaster cards. George Breeze made a couple custom patches that change latency & other settings. I used to have sound cracking w/ audigy 2 runing raid 0 o my old kt400 rig, then I tweaked Greorge Brezze patches best to my system & they solved my problem. I still have them on an old cd if someone needs them or they are not available on web anymore.

Pman · Jul 23, 2004, 10:28 PM

were is the auto start folder that you put the .bat into?

ViRuS2k · Jul 24, 2004, 05:38 AM

OMG why hasnt more people posted in here this is a godlike app ! changed my AGP x800 Pro from 255 to 032 and now i have noticed Windows XP Pro behaveing a little faster and also FARCRY i have noticed a boost

going to have to mess about with this little thing a little longer to get the correct settings though lol dont want to blow anything up but i did notice my X800`s Temps where the same as they have always been no change there so no heat ishues ect. motherboard temps from the northbridge seem the same aswell no changed there ! i dont know why this isnt stickyed and that hardly no one has posted its crazy heh

apoch003 · Jul 26, 2004, 10:44 AM

"e) Drag a shortcut of that BAT-file into your auto start folder"

What does this mean?

I dragged it into my windows startup folder but that didn't work.
I looked for a folder named "autostart" and "auto start", that didn't work.

What do you mean by auto start folder?

The_Neon_Cowboy · Jul 26, 2004, 11:12 AM

Quote:

Originally posted by germanjulian
DisableProgPCILatency and change the value from 0 to 1 this will be changed on the next restart to 32!!!!

That key looks famular i'm 99.9% sure thats in the *** drivers

germanjulian · Jul 26, 2004, 01:48 PM

yes that key is part of the ATI drives. when you disable it (set it to 1) the agp latency becomes the latency used in the BIOS! not 248 any more. atitool will have a tweak for this now. the guy who developed this told me. that key exists like 10 times in my registry. changed them all to 1 no problems. benchmarks are all the same. I tested with different latencies. and the auto startup folder is the when you press the start button, programs and whatever you put in the folder start will start every time windows boots up. make a shortcut to the bat file and dont acctually but the bat file in there. If I where you I would not bother using the porgram though! just do the registry tweak. easier and same effect.

Shadow Lady · Jul 26, 2004, 02:14 PM

interesting, so if this comes in the drivers, unian and omega should be using this no? i mean they use this?

ViRuS2k · Jul 26, 2004, 02:41 PM

Quote:

Originally posted by Shadow Lady
interesting, so if this comes in the drivers, unian and omega should be using this no? i mean they use this?

nope they dont use this wich is weird :P

btw Avril Lavigne i like her music aswell and just bought here new album :P
she never smiles though does she hehe

pr0digal jenius · Jul 27, 2004, 05:31 AM

Quote:

Originally posted by apoch003
"e) Drag a shortcut of that BAT-file into your auto start folder"

What does this mean?

I dragged it into my windows startup folder but that didn't work.
I looked for a folder named "autostart" and "auto start", that didn't work.

What do you mean by auto start folder?

i put it in here and it works fine:

C:\Documents and Settings\***USER NAME HERE***\Start Menu\Programs\Startup

Chilljf · Jul 27, 2004, 06:32 AM

Quote:

Originally posted by Shadow Lady
interesting, so if this comes in the drivers, unian and omega should be using this no? i mean they use this?

You will not gain fps from this. Setting the agp latency lower will sometimes help fix stuttering in games & movies. I found movies always had a jerkyness for me & setting agp latency lower solved it for me. Setting agp latency low can actually cause display & graphical problems as thats why ATI overrides it to 244/255. PCI clk settings are not universal for everyone so depending on your hardware/rig, certain settings work better/worse for others. Default is 32 clks & is what most people use, but some users perfer 64 & have solved problems with using 64 clks.

ViRuS2k · Jul 27, 2004, 06:43 AM

erm dude its not ATI that puts overrides it its plain ol jain windows lol its works fine for me aswell on 32 agp latency from 255 agp latency and all is fine but i need to find out what the best setting woudl be its a bit like trying to find what your best AGP 64/128 or 256 lol is :P

phongtruong12 · Jul 27, 2004, 08:41 AM

wow thanks man. i never knew WHY my speakers were crackling. i always thought it was something with the drivers or maybe my speakers were blown. now i know!!

germanjulian · Jul 27, 2004, 01:53 PM

Quote:

Originally posted by phongtruong12
wow thanks man. i never knew WHY my speakers were crackling. i always thought it was something with the drivers or maybe my speakers were blown. now i know!!

did this acctually fix your issue???

ViRuS2k · Jul 27, 2004, 05:45 PM

there is one game and only 1 game that makes my speaker crackle and pop and even with 32 agp latency it does not fix the problem and thats FARCRY

all other game si play are fine wonder why Farcry goes tits up with my Audigy 2 ZS card :/

germanjulian · Jul 27, 2004, 06:09 PM

switch of eax. with eax my machine crashed in farcry constantly. oh and use a usb keyboard not ps2. ahh what else...

swimtech · Jul 27, 2004, 06:29 PM

Very nice post germanjulian - I used the PCI latency patch years ago for hard drive improvement but didn't notice a difference and just didn't keep up.

I'm gonna try the registry thing from here and see if it doesn't fix the stuttering problem I've had in DX games on the home unit below. It'll be a while before I get to post back on this but I'll let you know...

Thanks!

The_Neon_Cowboy · Jul 28, 2004, 04:32 AM

Quote:

Originally posted by phongtruong12
wow thanks man. i never knew WHY my speakers were crackling. i always thought it was something with the drivers or maybe my speakers were blown. now i know!!

should of asked.... alot of chipsets have latency patch for that very issue

Quote:

Originally posted by ViRuS2k
nope they dont use this wich is weird :P

btw Avril Lavigne i like her music aswell and just bought here new album :P
she never smiles though does she hehe

some one does.... i'm not saying who

also the key

DisableProgPCILatency

does not exist in my windows xp corp SP2 registry

were are you finding the key?

Chilljf · Jul 28, 2004, 07:51 AM

Quote:

Originally posted by The_Neon_Cowboy
also the key

DisableProgPCILatency

does not exist in my windows xp corp SP2 registry

were are you finding the key?

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Contro l\Video\]

I am also using sp2 rc2 (2162). DisableProgPCILatency location did not change from sp1 for me. I did notice that under [HKEY_LOCAL_MACHINE\SYSTEM , there is now ControlSet003. In Win XP sp1 there is ControlSet001, ControlSet002 & CurrentControlSet. Seems they changed ControlSet002 to ControlSet003 in sp2. If Im not mistaking, CurrentControlSet is same as ControlSet001 & ControlSet002(3 in sp2) is just a backup

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Contro l\Video\{6C7C2024-52C4-441B-B1BB-EC3F72B39C0B}\0000]
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Contro l\Video\{AB16D567-48CE-455B-A3C8-61A15CBEE3FF}\0000]

The numbers might not be the same for u & u should have a couple dif entries in the registry. You have to find the ATI strings not VGA. I changed it in both ATI strings, but I think it might only be neccassry in one. I did this after a clean install, so I didnt have numerious entries in there. U might wanna run driver cleaner to clean up the reg here if its messy. Find "DisableProgPCILatency"= 0 & set it to 1, this will set agp pci latency to bios setting. Changing all of the DisableProgPCILatency entries will not cause harm as most entries are from previous drivers

The_Neon_Cowboy · Jul 28, 2004, 09:53 AM

Quote:

Originally posted by Chilljf
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Contro l\Video\]

I am also using sp2 rc2 (2162). DisableProgPCILatency location did not change from sp1 for me. I did notice that under [HKEY_LOCAL_MACHINE\SYSTEM , there is now ControlSet003. In Win XP sp1 there is ControlSet001, ControlSet002 & CurrentControlSet. Seems they changed ControlSet002 to ControlSet003 in sp2. If Im not mistaking, CurrentControlSet is same as ControlSet001 & ControlSet002(3 in sp2) is just a backup

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Contro l\Video\{6C7C2024-52C4-441B-B1BB-EC3F72B39C0B}\0000]
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Contro l\Video\{AB16D567-48CE-455B-A3C8-61A15CBEE3FF}\0000]

The numbers might not be the same for u & u should have a couple dif entries in the registry. You have to find the ATI strings not VGA. I changed it in both ATI strings, but I think it might only be neccassry in one. I did this after a clean install, so I didnt have numerious entries in there. U might wanna run driver cleaner to clean up the reg here if its messy. Find "DisableProgPCILatency"= 0 & set it to 1, this will set agp pci latency to bios setting. Changing all of the DisableProgPCILatency entries will not cause harm as most entries are from previous drivers

but they key is added by ? Ati drivers? ATI CP? Or is this an xp added key?

trying to track this down and clarify

becouse when i did a search of the registry i didn't get any hits for that key

Jul 21, 2004, 10:09 PM	#4
MythicaL I like computers. Join Date: Jan 2004 Location: In front of a monitor Posts: 3,399 Rep Power: 87 System Specs	Possible sticky? Looks awesome __________________ Always knew I didn't belong in this world. I wasn't made for this. But I'll never forget those who betrayed me, and those who never failed my trust.

Jul 21, 2004, 11:58 PM	#6
riles9262 Driverheaven brewmaster Join Date: Oct 2002 Location: British Columbia, Canada Posts: 4,842 Rep Power: 70 System Specs	Nice find man __________________ A beer a day keeps the doctor away.

Jul 22, 2004, 12:13 AM	#7
No_Style Styleless Wonder Join Date: Jun 2002 Location: Ottawa, Ontario Posts: 6,034 Rep Power: 0	Ahh yes.. Popping audio.. I stumbled across this before. It didn't do anything for me though. __________________ "The Best Style Is No Style" Specifications Here

Jul 23, 2004, 01:16 PM	#9
Chilljf DriverHeaven Junior Member Join Date: Jul 2002 Location: New Jersey, USA Posts: 46 Rep Power: 0	http://forums.pcper.com/showthread.php?t=337721 Here is a Windows Program from tictac (Abit Bios King) & CodeRed @ XtremeSystems.org allowing tweaking to all nForce2 base board on: - Memory Alpha Timing - AGP Controller Latency - AGP Bus Latency - PCI Latency Here is some info on what Memory Alpha Timing is.. http://forums.pcper.com/showthread.php?t=335978 Alot of good things have been goin on wit Abit's NF7 because of alot of great guys & hard work/time modding bioses.. alot of peeps breaking 250 fsb with 2-2-2-11 1T .. Its a great mobo & will hold me over to nforce 4 chipset this winter __________________ E2180 M0 w/Nirvana NV120 (AS5) @ 3ghz IP35-E (bios 15) 300x10 - 1.405vcore (2) 1g Ballistix PC6400 (5-5-5-15 2T 2.2v) MSI 8800GT OC Audigy 2 (2) 36g WD Raptor 600w Ultra X-finity (2 80mm Fans) w/ CM690 Case (3 120mm Fans) Plextor PX-712A Win XP Pro SP2

Jul 23, 2004, 03:22 PM	Thread Starter #11
germanjulian Back in London Join Date: Jul 2003 Location: London Posts: 1,797 Rep Power: 0	yeah that was more back in the kt333 days.. the popping sounds and sound card issues but some people still suffere from this __________________ /\|\ Asus P5W DH Deluxe, Intel C2D E6600, 2GB Corsair XMS2-6400C4 DDR2, E-VGA GeForce 7800 GT, Creative X-Fi Extreme Music, 500GB Seagate 7200.10 SATA, Lian Li PC-V1100 Aluminum Case Black, etc. http://germanjulian.com /\|\

Jul 21, 2004, 05:00 PM	#1
germanjulian Back in London Join Date: Jul 2003 Location: London Posts: 1,797 Rep Power: 0	Lower Your graphics card latency UPDATE: OK, the latency for the AGP bus for ATI cards is indeed 255! even when you select 32 in your BIOS. if you search your registry for DisableProgPCILatency and change the value from 0 to 1 this will be changed on the next restart to 32!!!! You can check your latency of all buses with this program: http://www.transformerman1.plus.com/LtcyCfg.zip What the author or the article below claims is that this fixes some stuttering in games but moreover get rids of audio popping and cracking issues, due to some devices taking up to much CPU time (high latency). with the program you can also change the latency from 32 to another you desire (remeber it has to something which can be devided by 8). Anyway I tested it only with Colin McRae 4 which I found stuttered very much for me (very little stutters) even though I had 50FPS. WIth this tweak the stutters are gone! Never experienced stutters with other games before but hey it does not hurt graphics performance! (tested with 3dmark03). anyway try it if you want: http://www.transformerman1.plus.com/LtcyCfg.zip Get the tool and see if your graphiccard is running at 248ms latency. Is it? Decrease latency of it (or any other device with a latency, '000' means: has none) to 64 or below (below may not be faster, depends on system) and go into your favorite 3D game! Any difference? I say YES and put my hands in fire for that. Note that you can save the config it to a file (click 'add to list first' or it won't work) and load it via batch file (read me) when windows starts because otherwise windows will overwrite your settings with the next boot (JUST LIKE IT DOES WITH YOUR BIOS SETTINGS! GRMMF!) Ok, to clear some things up. 1. The changes apply for AGP also! 2. You do not have to do it after every boot. a) Start program and make the changes you want (enter number and click 'set now' for the device you want to change) - make sure you don't touch the devices that don't have 000 (no) latency at all B) mark ALL entries and click on 'add to list', you will see a new column called 'new' on the right (means it's added) C) press 'save as' and save the table to a config file with a name you like into the program folder I suggest d) Go into the program folder, create a txt file and write into it: C:\LtcyCfg\LtcyCfg.exe -f:C:\LtcyCfg\config.cfg <- Replace with your path and name of config file of course. (I think you could leave the folders away as the file resides in the same directory of the program, but I never trust windows in such cases) Then save the txt-file and replace it's extension with BAT (if you can't see the extension you'll have to go to your windows-explorer->extras->folder options->somewhere...Google if you don't know and disable the 'hide extensions from known file types' or whatever it's called in the English version of XP) e) Drag a shortcut of that BAT-file into your auto start folder f) Done, if you want to make changes repeat step a-c. Happy gaming and more overall power (even on desktop) 3. Possible heat problem: I WOULD say no. Me and my friends (one doesn't even have a fan on his ATI!!!) didn't encounter any problems but only improvement of performance. Let me try to explain why (simple words, I'm no technician): Decreasing the latency does NOT mean INCREASING the response time of your hardware! The BUS latency stands for: How much time does a component of your PC (graphic card, network card, and sound card) have to perform an operation before another component can! Note that only one component can use the BUS at one time, then the next, then the next. In other words: instead of letting your graphic card do 100 operations in 248ms you set it to a lower number of operations in 32, 64, 128ms. (32 is minimum and must be a number that can be divided by 8) So the problem is while leaving the graphic card latency at 248ms - which it is mostly set to - that the component has TOO MUCH time and other important operations (soundcard for example) can not be performed in time, so the queue list is getting bigger and bigger-> CPU overload. Experiment a little with the settings and see what gets you best performance. In my opinion it's mostly the graphic card latency that hogs the CPU but you may tweak a little more out of it. Depends on hardware I guess. I have all my components set to 32ms now. For more info go here: http://www.mark-knutson.com/technique_to_target_inc/ (Note that at this URL you'll find another program called PCIDAWG. It does exactly the same but has no possibility of loading it with windows, anyway the information you'll find there is pretty good. It's written by the programmer of PCIDAWG) - - - - - ADDED SOME MORE INFO: Some of you might wonder why you have the "PCI Latency time" option in your BIOS if the PCI latency is messed up if you don't use a program like this one here. 1. Windows overwrites this setting. Duh 2. Some manufacturers of graphic cards and (possibly other hardware) set the latency of their cards to 248ms internally on the card itself (the programmer of PCIDAWG says that they do it to boost performance and that they are obviously wrong with that in most cases) Who knows why they didn't play out THAT joker by now. ; ) - - - - - One more thing: Don't blame me for a blown up card. I do not expect this to happen as I made only (and many) good experiences by tweaking these settings on many different PC systems. I tried to explain why hardware damage is probably never going to happen above BUT AT LAST: I'm no technician and no graphic card manufacturer. also worth checking out is: http://www.nforcershq.com/forum/vie...er=asc&start=15 __________________ /\|\ Asus P5W DH Deluxe, Intel C2D E6600, 2GB Corsair XMS2-6400C4 DDR2, E-VGA GeForce 7800 GT, Creative X-Fi Extreme Music, 500GB Seagate 7200.10 SATA, Lian Li PC-V1100 Aluminum Case Black, etc. http://germanjulian.com /\|\ Last edited by germanjulian; Jul 21, 2004 at 10:40 PM.

Jul 21, 2004, 06:21 PM	#3
Zelig HardwareHeaven Extreme Member Join Date: Jun 2003 Location: Canada Posts: 3,187 Rep Power: 69 System Specs	Nice links, I'm going to go read them now, and experiment a bit with my system...

Jul 21, 2004, 10:29 PM	#5
SchwarzeFeen DriverHeaven Junior Member Join Date: Jul 2004 Location: United States Posts: 38 Rep Power: 0	Cannot wait to test this out!!! Can't believe i haven't seen this before?!

Jul 23, 2004, 01:00 PM	#8
Chilljf DriverHeaven Junior Member Join Date: Jul 2002 Location: New Jersey, USA Posts: 46 Rep Power: 0	Here is alot of info on agp latency & ways to change it. Most info discussed here is in this thread & solved. http://forums.pcper.com/showthread.php?t=326158 I found pci latency 32/agp latency 64 works best for me(dif clks work better for others, so try yourself). I do not suggest using powerstrip as I noticed it took 50% CPU when I clicked 3dmark & then proceeded to stay at 100% while the 3dmark window was open. You can use wpcredit to change the agp latency. ATI Users - All u have to do is Find "DisableProgPCILatency"= 0 & set it to 1 in registry. This will stop the ATI drivers from overiding your agp latency. Then use wpcredit to change BUS#2 DEV#0 FUN#0 Offset: 0D Default data: FF (248clk) Change to: 32clk: 20 64clk: 40 128clk: 80 160clk : A0 192clk : C0 224clk : E0 255clk : FF btw.. I dont know if nvidia card drivers override the agp latency.. if someone can test nvidia card & confirm Here is a nice database of settings that can be changed from wpcredit. Thx tictac ************************ * nVidia nForce2 Data Base * ********************** 1) AGP Controller Latency ********************* PCI Bus#0 Dev#30 Func#0 Offset#0D 0D - 16 clock : 10 - 32 clock : 20 - 64 clock : 40 - 96 clock : 60 - 128 clock : 80 - 160 clock : A0 - 192 clock : C0 - 224 clock : E0 - 255 clock : FF 2) AGP Bus Latency ************** PCI Bus#0 Dev#30 Func#0 Offset#1B 1B - 16 clock : 10 - 32 clock : 20 - 64 clock : 40 - 96 clock : 60 - 128 clock : 80 - 160 clock : A0 - 192 clock : C0 - 224 clock : E0 - 255 clock : FF 3) PCI Latency *********** PCI Bus#0 Dev#8 Func#0 Offset#1B 1B - 16 clock : 10 - 32 clock : 20 - 64 clock : 40 - 96 clock : 60 - 128 clock : 80 - 160 clock : A0 - 192 clock : C0 - 224 clock : E0 - 255 clock : FF here are some more threads on it.. I posted it over month+ ago.. I thought I did here too, musta missed it.. http://www.nforcershq.com/forum/view...50182&start=15 http://www.rage3d.com/board/showthread.php?t=33764542 __________________ E2180 M0 w/Nirvana NV120 (AS5) @ 3ghz IP35-E (bios 15) 300x10 - 1.405vcore (2) 1g Ballistix PC6400 (5-5-5-15 2T 2.2v) MSI 8800GT OC Audigy 2 (2) 36g WD Raptor 600w Ultra X-finity (2 80mm Fans) w/ CM690 Case (3 120mm Fans) Plextor PX-712A Win XP Pro SP2

Jul 23, 2004, 03:44 PM	#12
Chilljf DriverHeaven Junior Member Join Date: Jul 2002 Location: New Jersey, USA Posts: 46 Rep Power: 0	I see alot of people w/nforce2 mobo's that have sound cracking. Some users have been able to find fixes depending upon their case, but some none. http://forum.abit-usa.com/showthread...g&pagenumber=1 yea alot of kt333 users had problems with sound blaster cards. George Breeze made a couple custom patches that change latency & other settings. I used to have sound cracking w/ audigy 2 runing raid 0 o my old kt400 rig, then I tweaked Greorge Brezze patches best to my system & they solved my problem. I still have them on an old cd if someone needs them or they are not available on web anymore. __________________ E2180 M0 w/Nirvana NV120 (AS5) @ 3ghz IP35-E (bios 15) 300x10 - 1.405vcore (2) 1g Ballistix PC6400 (5-5-5-15 2T 2.2v) MSI 8800GT OC Audigy 2 (2) 36g WD Raptor 600w Ultra X-finity (2 80mm Fans) w/ CM690 Case (3 120mm Fans) Plextor PX-712A Win XP Pro SP2

Jul 23, 2004, 10:28 PM	#13
Pman DriverHeaven Lover Join Date: Jun 2004 Posts: 115 Rep Power: 0	were is the auto start folder that you put the .bat into? __________________ [color=black]\| AMD Athlon64 3200+ ''Newcastle'' \| GigaByte GA-K8NS PRO \| Corsair CMX512-3200LL PRO \| BFG TECH 6800GT-OC (370/1000)\| Maxtor Diamond Max Plus 9 120GB \| Thermaltake Pipe101 Heatsink and Thermaltake UFO UV Blue Fan \|[/color]

Jul 24, 2004, 05:38 AM	#14
ViRuS2k HardwareHeaven Extreme Member Join Date: Mar 2003 Location: Uk Posts: 8,334 Rep Power: 72 System Specs	OMG why hasnt more people posted in here this is a godlike app ! changed my AGP x800 Pro from 255 to 032 and now i have noticed Windows XP Pro behaveing a little faster and also FARCRY i have noticed a boost going to have to mess about with this little thing a little longer to get the correct settings though lol dont want to blow anything up but i did notice my X800`s Temps where the same as they have always been no change there so no heat ishues ect. motherboard temps from the northbridge seem the same aswell no changed there ! i dont know why this isnt stickyed and that hardly no one has posted its crazy heh

Jul 26, 2004, 10:44 AM	#15
apoch003 DriverHeaven Lover Join Date: Jul 2002 Location: usa Posts: 214 Rep Power: 0	"e) Drag a shortcut of that BAT-file into your auto start folder" What does this mean? I dragged it into my windows startup folder but that didn't work. I looked for a folder named "autostart" and "auto start", that didn't work. What do you mean by auto start folder?

Jul 26, 2004, 01:48 PM	Thread Starter #17
germanjulian Back in London Join Date: Jul 2003 Location: London Posts: 1,797 Rep Power: 0	yes that key is part of the ATI drives. when you disable it (set it to 1) the agp latency becomes the latency used in the BIOS! not 248 any more. atitool will have a tweak for this now. the guy who developed this told me. that key exists like 10 times in my registry. changed them all to 1 no problems. benchmarks are all the same. I tested with different latencies. and the auto startup folder is the when you press the start button, programs and whatever you put in the folder start will start every time windows boots up. make a shortcut to the bat file and dont acctually but the bat file in there. If I where you I would not bother using the porgram though! just do the registry tweak. easier and same effect. __________________ /\|\ Asus P5W DH Deluxe, Intel C2D E6600, 2GB Corsair XMS2-6400C4 DDR2, E-VGA GeForce 7800 GT, Creative X-Fi Extreme Music, 500GB Seagate 7200.10 SATA, Lian Li PC-V1100 Aluminum Case Black, etc. http://germanjulian.com /\|\

Jul 26, 2004, 02:14 PM	#18
Shadow Lady Avril Fan Join Date: Jun 2003 Location: somewhere in colombia, okok, bogotá city :p Posts: 1,262 Rep Power: 0	interesting, so if this comes in the drivers, unian and omega should be using this no? i mean they use this? __________________ Oblivion ftw

Jul 27, 2004, 06:43 AM	#22
ViRuS2k HardwareHeaven Extreme Member Join Date: Mar 2003 Location: Uk Posts: 8,334 Rep Power: 72 System Specs	erm dude its not ATI that puts overrides it its plain ol jain windows lol its works fine for me aswell on 32 agp latency from 255 agp latency and all is fine but i need to find out what the best setting woudl be its a bit like trying to find what your best AGP 64/128 or 256 lol is :P

Jul 27, 2004, 08:41 AM	#23
phongtruong12 DriverHeaven Addict Join Date: Jun 2004 Location: Georgia Posts: 264 Rep Power: 0	wow thanks man. i never knew WHY my speakers were crackling. i always thought it was something with the drivers or maybe my speakers were blown. now i know!! __________________ Sony VAIO RX860 2.4 @2.6 Ghz, 533 @580 Mhz PQI 1 GB PC2700 80 GB Hard Drive 5400 RPM Thermaltake 480W PSU X800XL 256 MB VIVO Soundblaster Live! 5.1 Logitech X530 Speakers

Jul 27, 2004, 05:45 PM	#25
ViRuS2k HardwareHeaven Extreme Member Join Date: Mar 2003 Location: Uk Posts: 8,334 Rep Power: 72 System Specs	there is one game and only 1 game that makes my speaker crackle and pop and even with 32 agp latency it does not fix the problem and thats FARCRY all other game si play are fine wonder why Farcry goes tits up with my Audigy 2 ZS card :/

Jul 27, 2004, 06:09 PM	Thread Starter #26
germanjulian Back in London Join Date: Jul 2003 Location: London Posts: 1,797 Rep Power: 0	switch of eax. with eax my machine crashed in farcry constantly. oh and use a usb keyboard not ps2. ahh what else... __________________ /\|\ Asus P5W DH Deluxe, Intel C2D E6600, 2GB Corsair XMS2-6400C4 DDR2, E-VGA GeForce 7800 GT, Creative X-Fi Extreme Music, 500GB Seagate 7200.10 SATA, Lian Li PC-V1100 Aluminum Case Black, etc. http://germanjulian.com /\|\

Jul 27, 2004, 06:29 PM	#27
swimtech HardwareHeaven Extreme Member Join Date: May 2002 Location: North Carolina Posts: 4,040 Rep Power: 122 System Specs	Very nice post germanjulian - I used the PCI latency patch years ago for hard drive improvement but didn't notice a difference and just didn't keep up. I'm gonna try the registry thing from here and see if it doesn't fix the stuttering problem I've had in DX games on the home unit below. It'll be a while before I get to post back on this but I'll let you know... Thanks! __________________ It's not so much getting your way that matters or not - what matters is how you go about getting it.