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Command Rate with 2 sets TWINX 1024MB PC3200 C2

Texas Jack

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Today I bought a extra set of TWINX 1024MB PC3200 C2 PT.

I had already a set of TWINX 1024MB PC3200 C2.


After installing, the bios detects the ram as DDR333.

After manually set this to DDR400 on timings 2-3-3-6 2T, my system runs stable.


I have a motherboard MSI K8N NEO4-F, with a AMD X2 4200+ (stepping E4).


Did a few test with 3Dmark2006, and no problems so far on the first sight.

Just a little loss in points (~8-10 points less).

The game STALKER runs now smoother then before (this was the main reason I bought a extra Gig).


My 2 questions now are:

1) Can I chance the Command Rate to 1T with these four dimms?

With the first set I always ran stable 2-3-3-6 1T, but I read on the internet that in case of using 4 dimms, you must use 2T.

I'm a little carefull, so I don't break anything...

2) What's the technical difference between the 2 sets?

The first set is C2 (black heatsink), and the new set is C2 PT (platium heatsink).

Both of them are 2-3-3-6 latency's.


Tonight I test my settings 2-3-3-6 2T with memtest86+ V1.70.

I keep an update...

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You would need to set the Command Rate to 2T with more than two modules installed.

Command Rate is not really a memory setting and would be dependent on the make and model of MB and PSU and the specific CPU you have installed. You might look this setting up on http://www.rojakpot.com and get a better explanation.


Please see What does C2, LL, PT, R or RE stand for in the part#? for you second question. However, the revision of the modules may be different and have different memory IC's

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Thx for the answer RAM guy, I will check it out.


Last night I run memtest86+ V1.70, 10 full tests passed on periode of 7h30.

No single error.

My setting are DDR400 2-3-3-6 2T Dual Channel.

When going to your second link, I read that C2 on amd must be on 2.5.


In my case, with four modules, must I set this also to 2.5, or the test with memtest say's enough, and can I run stable on setting 2?


I'm now going to do a new test with settings 2.5-3-3-6 2T, to see if in the same periode of 7h30, I do the same or more tests.

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