[Kgentatszu]]

quote:

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Maxwell1234 wrote on 05-16-2003 09:12 AM:
hi digital,
i would like to ask you a few questions...........first of all, what's is dual -channel DDR actually?? and can my motherboard support it?? by the way, what are the criterias of selecting good stick of ram?? cause i've just found out mine.....its "APACER PC 2100 UNB CL2"

[Kgentatszu]]

Guys, any help appreciated...........apart from that, which motherboard can support dual-channel ddr??( at low affordable prices )

[Vampyromaniac]

I don't know too much about Intel selections,
but I believe boards based on the E7205 "Granite Bay" chipset
or the i875P "Canterwood" chipset are the ones which support
Dual-Channel DDR (not sure about prices.)

What Dual-Channel does is increase the available amount of maximum memory bandwidth, if the FSB doesn't already limit it.
It looks like you've overclocked your FSB to around 600MHz, which equates to a badwidth of about 4800 MB/s.
But, since your RAM is at 190MHz DDR, that amounts to about 3040 MB/s.
The amount of maximum theoretical memory bandwidth, is always the lower figure of the two. (sort of like only strong as the weakest link)
So right now you only have 3040 MB/s. This is where Dual-Channel comes in.
If you were to run memory at 190MHz DDR, in Dual-Channel, it provides for double the previous figure: 6080 MB/s.
So with Dual-Channel DDR, you would now have 4800 MB/s available (since it is limited by the FSB bandwidth.)

hope that helps somewhat

[Kgentatszu]]

wow, that's kinda hard for me to understand/digest............simplify it, please....

[Vampyromaniac]

Ok, basically the point of DualChannel is so you have more bandwidth

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In your case:

your FSB gives 4800
your RAM gives 3040

your bandwidth is the lower number, so 3040

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What Dual-Channel does is double your RAM number.

So with Dual-Channel,

your FSB gives 4800
your RAM gives 6080

your bandwidth is the lower number, so 4800

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So before, your bandwidth is: 3040
But, with Dual-Channel, it is: 4800

That's what Dual Channel is for, to increase available memory bandwidth.


better?

[Kgentatszu]]

where do you get 3040 and 4800? and why is it always the lower number?? and how much performance boost will i gain from dual-channel DDR?

[Vampyromaniac]

Originally posted by Maxwell1234
where do you get 3040 and 4800?

I just left that out to avoid confusion
You take the take the MHz speed and multiply by 8.
So your FSB is 600MHz times 8 = 4800
In the case of RAM, multiply the MHz by 2 if it is DDR.
Your RAM is 190 times 2 times 8 = 3040

and why is it always the lower number??

That's just how it is
Maybe think of it this way, if you had 10 hot dogs and only 8 buns, you could only have 8 dog&bun sets.
But if you had 10 hot dogs and 16 buns, you could have 10 dog&bun sets

and how much performance boost will i gain from dual-channel DDR?

That's hard to predict. It could be maybe 1 or 2%, or maybe 5 to 10%. It depends on if the program you're using transfers a lot of data to/from memory.

[Kgentatszu]]

lol~, GOOD EXPLAINATION VAMPY..........i got it. thankz.....but 1-10% isnt that a bit low?? i was expecting at least 50%

[Vampyromaniac]

Well, you have to consider that you're just talking about memory here, not a CPU or video card upgrade that would bring significant changes. Not even talking about increasing the amount of memory, like from 128MB to 512MB. Only how memory transfers are conducted. I think a 5% increase from something so subtle should be satisfactory.

[Kgentatszu]]

so, in your oppinion, is it worth the replacement of my new MOBO?? By the way, vampy, hope you REALYY enjoy the shiny card!!!! i'm planning on gettin one too....

and remember to change your signature...

[Vampyromaniac]

If you want to replace your mobo just for the Dual-Channel, I'd say no, save your money for something else.
I'd say just wait until you actually need a new mobo (like for a new CPU or some other major reason,)
then you can go ahead and get something with Dual-Channel at that time.
But spending that much money just for ~5% gain, is just not worth it to me.




And . . . I Just Can't Wait!! until I get the new card

[Kgentatszu]]

thankz Vampy, cause i was almost wanting to change my mobo right away...........

[Vampyromaniac]

No problem

[Necrosis]

Originally posted by Vampyromaniac
If you want to replace your mobo just for the Dual-Channel, I'd say no, save your money for something else.
I'd say just wait until you actually need a new mobo (like for a new CPU or some other major reason,)
then you can go ahead and get something with Dual-Channel at that time.
But spending that much money just for ~5% gain, is just not worth it to me.

And . . . I Just Can't Wait!! until I get the new card

Whoa Vampy..what are you basing this 5% increase from..knowledge of Dual AMD or Intel?

Intel's solution is much more efficient that Nvidia's.

Max,

You would not have that much advantage to upgrading to a "cheap" Intel dual channel board because of your current ram speed plus the fact there is no "cheap" Dual Channel Intel MB.

However, theoritcally you could put your current processor in a Canterwood board and not worry about stressing it too much because of your current OC. Honestly though since Intel is releasing new chipsets in the near future you would be better off doing a ram upgrade than anything else. However, a monitor upgrade wouldn't hurt either. 15"..I'm sorry but I would start donating plasma just to get something better.

[Vampyromaniac]

Oh, I didn't mean 5% bandwidth gain, I meant overall performance,
but if you have a better guess than my ~1-10%, I'm sure maxwell would appreciate it

[Kgentatszu]]

Originally posted by Necrosis
Whoa Vampy..what are you basing this 5% increase from..knowledge of Dual AMD or Intel?

Intel's solution is much more efficient that Nvidia's.

Max,

You would not have that much advantage to upgrading to a "cheap" Intel dual channel board because of your current ram speed plus the fact there is no "cheap" Dual Channel Intel MB.

However, theoritcally you could put your current processor in a Canterwood board and not worry about stressing it too much because of your current OC. Honestly though since Intel is releasing new chipsets in the near future you would be better off doing a ram upgrade than anything else. However, a monitor upgrade wouldn't hurt either. 15"..I'm sorry but I would start donating plasma just to get something better.

guys, i know asking these questions would make me sounded like an ultra nOOB..............What's a canterwood board?? any difference from mine?? in these days, how fast is a ram considered "fast"??and how much performance can i gain from a canterwood board??