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I have Twins pc6400c4 memory (2gig)

And its timings are 4-4-4-12.

First of all i had big time issues trying to get it work at those timings.

But ok, now i am all set.

V = 2.1v

MCH = 1.65v

DDR = 800Mhz.


But the memory doesnt run at full speed , i get only 5700MB/s in Sandra 2006 Proffessional.

It must get close to 10Gb/s as far as i know ...


MB : Abit AWD9-Max. Bios 1.3 . Beta3.

Btw, i had the timings by default

5-5-5-15-35 and i set them to 4-4-4-12, But i do not know about the last value...


Any suggestions please ?

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I had 2.8ht pentium 4 with msi 875p MB and "G.E.I.L."400mhz cl2.5 memory

on that system i got 4700mbs ...

Kinda funny that from all the Improvements i get only 1 extra gb/s ....

Whats the point in all the 800mhz , 4-4-4-12 timings and the EPP thingy ?

Btw plz reply on my question about the setting that i saw by spd 5-5-5-15-35 now i have


it says total cycle time or something like that.

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  • Corsair Employees

The performance will vary with MB and chipset but the Intel chipset is not the best memory performance.

You can follow the link in my signature for the tested settings and they would need to be set manually and any setting not listed should be set to Auto or Bios default. You can get more information on un-published settings at http://www.rojakpot.com

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I have not found Intel motherboards to be the best at memory translation speeds and I think that is what RamGuy means.


I have tested this same ram on more than a few boards. The Gigabyte 965p-ds3 with 2 X 1024 6400C4's I had ~7,400. This was on a Core2 E6600 overclocked to 3.4Ghz and the ram running at 827MHz 4 - 4 - 4 - 10 and 2.1v




I assume you are running your system at a stock CPU which is 2.4Ghz since Intel boards do not offer much in the way of upclocking the CPU. Then you can not expect anything close to these numbers that I get though.


EPP allows AMD systems (That read EPP) to automatically set for the 4 - 4 - 4 - 12 as in Intel systems one usually must manually set them.

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i read that the best for stability and performance is to set fsb:dram 1:1

wich is not like that by default ...

how should i set it ?

i did 400mhz x 6 = 2400 wich is my e6600cpu and set 533, 1:1 to get 800mhz

but my pc wouldnt start ...

any advice ?

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  • Corsair Employees

DDR2 Memory runs at:

DDR2-533 = 266 Clock Frequency 2 X 266 = DDR2 533

DDR2-667 = 333 Clock Frequency 2 X 333 = DDR2 667

DDR2-800 = 400 Clock Frequency 2 X 400 = DDR2 800

DDR2-1066 = 533Clock Frequency 2 X 533 = DDR2 1066


Intel CPU:

533 MHz = 133 MHz Clock Freq. 133 X 4

800 MHz = 200 MHz Clock Freq. 200 X 4

1066 MHz = 266 MHz Clock Freq. 266 x 4

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  • Corsair Employees
I would try the CPU at it's default and set the memory Frequency at 533 MHz and then work you way up slowly and see where it tops out. And you may need to change some of the CPU settings IE: Voltage & Multiplier to get the system stable!
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