[Lowfat]

For those of you who have a Wolfdale/Yorkfield Core 2 Duo, post your results in this thread.

Here is my 24/7 clocks so far.



4.2GHz is requiring 1.4875V

[PangingJr]

Originally Posted by Lowfat

4.2GHz is requiring 1.4875V

that is what about i used to tell you, i try to get one that can do low core volt overclocking and stable.
right now the system can boot 3 of my Wolfdales E8200 to 4.0GHz at 1.35-1.37V but i cannot get into Windows with this low volts.

[Lowfat]

I can boot with 1.425V or so, but as soon as I run Orthos, it locks up immediately. I've seen a few E8400s that would do 4GHz with 1.3V on XS.org. I've also seen ones with the same batch as me do considerably better. Seems to be very hit and miss right now.

[PangingJr]

i have seen plenty of E8200 overclocked at 4 GHz with low core volts using similar boards like mine.
and in some cases somehow E8200 are seem like more cooler than E8400 running at same clock speed, it may be just a different in the cooling system in use. but my friend starts to get some E8400s and says the same thing and i think my E8200's core temps are very, very good. and i love these processor just for that. lol.

[ChaosMinionX]

I will have some yorkfield results shortly, I am waiting on Corsair to get me my new RAM.

[PangingJr]

my best Super Pi 1M time so far (can't go any more further than this, it'll be too much Vcore.)





and here's my stable so far at 3.8 GHz 475x8 BIOS set 1.1125 V / 1.49V in XP (with P965-DS4 F11f)
i probably can't get a 4GHz stable on E8200's with my existing hardware and system cooling.

[PangingJr]

and here's my fav E8200 overclocks... E8200 running at 600x8 on air (freezer 7 pro) with 1.488V under a Gigabyte G33 based board. and Lowfat, if you go into those threads you will see a poster has mentioned that his E8200 gets a 4.0GHz primestable at only 1.18x V. under a DFI P35 DK board. - E8200 doing 600x8 on air with 1.488V - XtremeSystems Forums

[PangingJr]

another setting for my 3.8GHz overclock...

3.8GHz
Core voltage is BIOS set at 1.13 V. and all of the supported features are enabled.


55C load under Orthos's small FFTs test...



CPU 50% load...



idling...



fully idle...

[PangingJr]

i can't edit the above...


anyways, for a stable 3.8GHz, i can also either set core voltage at 1.1125 V. with C1E, EIST, TM2 disabled,
or set the core voltage at 1.475 V., however, the core voltage will remain at all time at around 1.488 V., the CPU temp at full load are all the same, but when CPU idling, the 1.13 V. settings will get a better CPU's temps.

[PangingJr]

update to my best Super Pi 1M time...

4.26 GHz 533x8...




today i can go all the way to 560x8 with core voltage set at 1.65V, but i can only get in Windows at 533 FSB.
and this seems to be max overclock for the current hardware setup on this computer. (it uses 4 disk drives and 500W power supply)


4.20 GHz 525x8...

[ChaosMinionX]

Pang lets see sub 10sec SPI

Tighten up those ram timings, or push the ram some more

[PangingJr]

537x8 4.3 GHz






was able to get in to a Windows at 545x8 by loading BIOS default first, and then reboot and set BIOS to boot 545 FSB directly... also had to use auto DRAM settings...
Windows loaded okay, but once i adjusted the memory timmings using the Memset the Windows locked up. the NB, chipsets, and the processor itself needs to be cooling down some more before i can apply even more volts to them.

if i'm not too lazy and get some work done by taking apart computers that i just built them and swopping some parts and also some work on a chipset and system processor cooling solution, then i should have these Wolfdale's to overclock at much more better than what i already had.

[Zardon]

ive been hearing some of the yorkfields are dying with high voltages guys, be careful.

[PangingJr]

and here's Super Pi 1M time of E8200 at default clock speed with a system that using a basic DDR2-800MHz DRAM settings.

[PangingJr]

Originally Posted by Zardon

ive been hearing some of the yorkfields are dying with high voltages guys, be careful.

thanks for the warning Zardon.
i mean i understand and i appreciate your warning.

so, here the warning word from me to anyone who read this thread...

don't use the processors's core-voltage that you see here as for your reference to overclocking your system processors.
and you play with your hardware and with your own risk.

[Zardon]

out of curiousity Panging, what voltage would you consider to be a relatively safe 24/7 setting for a wolfie or yorkie?

[PangingJr]

i'm sorry i really don't know (yet) Zardon.
all i know for sure is what Intel has spec'ed all of the already released Wolfdale's at 1.3625V for max core-voltage.
as of now, myself try to use not more than 1.3625V.


btw, some of the Wolfdale's E8200 and E8400 are able to be overclocked quite high when using core-voltage at not more than 1.3625V,
but some of them won't overclock high at all with 1.3625V.

some of E8200's are able to clock at 3.6 GHz with only 1.25V. and many E8200's out there won't do the same.
same with E8400's processors, as i have been seeing many of them will get 4.0 GHz with core-voltage of only 1.28V-1.325V. and some of the E8400 won't do 4.0 GHz with these low core-voltages.

however, as you may have noticed before that on the previous C2D's processors, the max core-voltage used to be spec'ed by Intel to something around 1.325V -1.350V then if i can recall corectly, all of the C2D's processors spec has been changed to 1.500V for the max core-voltage. and as far as i know, some certain OEM built computers that uses the C2D processors model before Wolfdale's even use 1.50V as default core-voltage on some of their custom built computers. i'm not sure whether or not these OEM companies would get an info from Intel about the a real safe max core-voltage for the Wolfdale's, i'll have to ask around for it when i can.

[Zardon]

ive been trying to get a defacto answer in relation to the new quad core cpus (yorkfield) and the wolfies. various trains of thought on it. Intel are slow getting back to me.

I can get the skulltrail system stable at 4.2ghz however the voltage is around 1.48 which seems a little high to me.

[ChaosMinionX]

I personally will not go over 1.45v on water with a Yorkie. I may change that after I get this rig up and start playing with it though.

But I have seen some dead Penryns on various forums from high voltages, regardless of cooling.

Would be interested to hear what Intel has to say Z.

[Zardon]

Originally Posted by ChaosMinionX

Would be interested to hear what Intel has to say Z.

well considering the built in "overvolt" option on the skulltrail bios increases voltage from 1.25 to 1.48 I would be interested myself. I can't see intel supplying an option in one of their new bioses which in fact kills their cpu's. Then again i have an alpha bios on this, so its hard to know whats a work in progress or what is intentional.

[ChaosMinionX]

I was looking at some reviews today, boy if skulltrail didnt use FBD, I would be all over it.....I like my fast RAM

They need to release a dual socket X48 for LGA775 and I would be in heaven with dual QX9650's at like 450x9

[Zardon]

Originally Posted by ChaosMinionX

I was looking at some reviews today, boy if skulltrail didnt use FBD, I would be all over it.....I like my fast RAM

What apps specifically do you find benefit you with (im guessing as its you), high end DDR3?

[Zelig]

Originally Posted by Zardon

What apps specifically do you find benefit you with (im guessing as its you), high end DDR3?

Superpi.

[ChaosMinionX]

Originally Posted by Zelig

Superpi.

Precisely


That and some other synthetic benching, I am actually using 4GB of Corsair Dominator 8888C4DF atm.... moving to DDR3 with Asus Rampage (x48 though) with DDR3 Dominator 1800C7DIN

[PangingJr]

.5 multi overclocks...

P35-DS4 BIOS F12b with .5 CPU multi support.
Thanks to Gigabyte's technical support personnel for providing me this F12b BIOS for testing.


MCH at 1.25V (stock)...


400x7.5... 3.00 GHz 4:5 DDR1000





444x7.5... 3.33 GHz 5:6 DDR1066





467x7.5... 3.50 GHz 5:6 DDR1121





480x7.5... 3.60 GHz 4:5 DDR1200





--------------------------------


500x7.5 (MCH 1.425V)... 3.75 GHz 5:6 DDR1200





550x7.5 (MCH 1.50V)... 4.13 GHz 1:1 DDR1100

[Zardon]

Originally Posted by ChaosMinionX

Precisely


That and some other synthetic benching, I am actually using 4GB of Corsair Dominator 8888C4DF atm.... moving to DDR3 with Asus Rampage (x48 though) with DDR3 Dominator 1800C7DIN

Ah right, thats cool for a moment I thought it was something utterly worthless ......

[PangingJr]

here (below) is some info i found so far about retail Wolfdales's FPO/BATCH# that have some good overclocking and with low core voltage use.

E8200 that has FPO/BATCH# Q740A***T (i think this is one of the first batch released), as far as i know, CPU will need a high core voltage to overclock it above 450 (CPU FSB) or so.
E8500 Q740A***T, however, are very good overclocker CPUs.

===============================

Intel is holding back on releasing E8500 inventory - hwbot.org

Here, in Romania, it was something like this:

20th Jan - A shipment with lots of E8200, ~10 E8400 and a few (5-10) E8500 was out on the market, and instantly sold out.

E8200 - Q740A - it was pretty weak for o/c. I mean...very low temps, good for daily use, but most off them stopped at ~4300Mhz on air.

E8400 - Don't know much about these ones, medium oc'ers I suppose.

E8500 - Q740A - Good overclokers, very high FSB (580 on air), pretty decent volts for Orthos @ 4Ghz-4,3Ghz

28th Jan - a shipment with E8400 came on the market, something like 30 pcs. Of course, they instantly sold out

E8400 - Q746A - Great oc'ers, would easily do 4700-4800 air cooled with normal temps, very low volts needed for Orthos at highs clocks. Very hot Cpu's though ( I own one of these)


Since then, they keep on bringing small numbers of CPU's, and they sell them like hot bread. I don't know what's up with this, I mean..everybody is trying to get one of these, and Intel certainly have stock (they are producing them at least since November 2007). why they are not throwing them on the market with full force....this I don't know

XtremeSystems Forums - View Single Post - E8200 doing 600x8 on air with 1.488V

Now we have 3 good E8200

Q744A736 = 4Ghz @ 1.208v (VID 1.0875v)
Q745A705 = 4Ghz @ 1.184v (VID 1.0750v)
Q745A706 = 4Ghz @ 1.216v (VID 1.0875v)

[Zardon]

pretty good core voltages. takes me almost 1.5v to get the Skulltrail CPUs to 4.2ghz.

[ChaosMinionX]

Originally Posted by Zardon

Ah right, thats cool for a moment I thought it was something utterly worthless ......

[Exilon]

Originally Posted by Zardon

out of curiousity Panging, what voltage would you consider to be a relatively safe 24/7 setting for a wolfie or yorkie?

As far as I know, Intel has specified 1.45v as the absolute limit for 45nm Core 2 Duos beyond which there will be almost certain damage to the CPU even if it is brought below 1.45v. Intel defines 1.3625v to 1.45v as the range where stability or longevity cannot be guaranteed. To play it safe until more information come out, stay below 1.3625v.