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First Memory OC question

post #1 of 14
Thread Starter 
Hey guys this is my first memory OC so I just have a couple questions just to make sure I won't make any stupid mistakes and ruin my RAM.

I have this Memory:

http://www.corsair.com/memory-3/xms-...m2a1600c9.html

So apparently its running at 667 MHz when it's supposed to be running at 1600Mhz, and in the bios everything is set to auto, so first:

I'll change the DRAM voltage to 1.659V if I'm correct? (The voltages are at 1.65V but 1.659 is the closest to it in the BIOS)

and then I'll change the frequency to 1600Mhz.

Is this it, or are there any other steps I have to do?

Thanks for any HelP!
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post #2 of 14
It's actually running at 1334Mhz, 667x2. You know, double date rate, DDR

You should just have to change the RAM divider and set the voltage to get as close to the rated speeds as possible iirc..
post #3 of 14
Thread Starter 
Quote:
Originally Posted by GeforceGTS View Post
It's actually running at 1334Mhz, 667x2. You know, double date rate, DDR

You should just have to change the RAM divider and set the voltage to get as close to the rated speeds as possible iirc..
Ok so say I want to OC it to 1600 Mhz... Is what Im doing correct?
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post #4 of 14
Don't forget to set your timings to 9-9-9-24 (CL, tRCD, tRP, and tRAS respectively). You can set the command rate to 1T as it should not effect stability and be faster than 2T.

Quote:
Originally Posted by Nocturnal View Post
Ok so say I want to OC it to 1600 Mhz... Is what Im doing correct?
The kit is rated for 1600mhz so it wouldn't really be OC'ing lol, but just change your RAM divider and do the steps I put above and it should be smooth sailing. If it's unstable which I doubt it will be, just bump your CPU-NB voltage a little.
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post #5 of 14
Thread Starter 
Quote:
Originally Posted by Dopamin3 View Post
Don't forget to set your timings to 9-9-9-24 (CL, tRCD, tRP, and tRAS respectively). You can set the command rate to 1T as it should not effect stability and be faster than 2T.



The kit is rated for 1600mhz so it wouldn't really be OC'ing lol, but just change your RAM divider and do the steps I put above and it should be smooth sailing. If it's unstable which I doubt it will be, just bump your CPU-NB voltage a little.
Thanks. And noob question; How do I know if its stable?
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post #6 of 14
Quote:
Originally Posted by Nocturnal View Post
Thanks. And noob question; How do I know if its stable?
You can run memtest86+. Just burn the .iso to a CD and boot to your optical drive. It runs outside of Windows and is very good for testing memory stability. A full pass shouldn't take any longer than an hour or two which will let you know if you are stable.
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post #7 of 14
Quote:
Originally Posted by Dopamin3 View Post
You can run memtest86+. Just burn the .iso to a CD and boot to your optical drive. It runs outside of Windows and is very good for testing memory stability. A full pass shouldn't take any longer than an hour or two which will let you know if you are stable.
MemTest isn't good for finding minor memory instability. It's mainly useful for finding defective modules.

OP: To check for memory stability, run Prime95 and use custom settings. (Or just try Blend first.) If I have 4GB of RAM, I set it to use ~3400 MB in the custom options. 4-8 hours later you should be running strong.

Small and Large FFTs will not make full usage of your RAM, so make sure to use Blend or custom settings.

I'd use both Prime95 and Memtest, btw. I'd run at least 2-3 passes of Memtest, as heat builds on the modules they can become unstable. It can't hurt to run both.

Also, in CPUz 1600mhz will be read as 800mhz (as already pointed out, because memory runs at double data rate.)
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post #8 of 14
Thread Starter 
Ok thanks.. And 1.659v or 1.645V?
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post #9 of 14
Quote:
Originally Posted by pursuinginsanity View Post
MemTest isn't good for finding minor memory instability. It's mainly useful for finding defective modules.

OP: To check for memory stability, run Prime95 and use custom settings. (Or just try Blend first.) If I have 4GB of RAM, I set it to use ~3400 MB in the custom options. 4-8 hours later you should be running strong.

Small and Large FFTs will not make full usage of your RAM, so make sure to use Blend or custom settings.

I'd use both Prime95 and Memtest, btw. I'd run at least 2-3 passes of Memtest, as heat builds on the modules they can become unstable. It can't hurt to run both.

Also, in CPUz 1600mhz will be read as 800mhz (as already pointed out, because memory runs at double data rate.)
No. Memtest86+ tests the memory fully.

Prime95 Large FFT test is unnecessary, and Blend Test is nice for testing if the CPU's IMC can keep up with the memory. But 1600mhz CAS 9 is not going to stress the CPU's IMC at all so, running the blend test is basically a waste of time.

Quote:
Originally Posted by Nocturnal View Post
Ok thanks.. And 1.659v or 1.645V?
Or you can try even lower Start around 1.6v and see if it fails, from there you can increase it if need be.
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post #10 of 14
Thread Starter 
Perfect! Thanks guys +rep running memtest now..
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The Nocturnal
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