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How to overclock with ASRock N68C-S UCC and Corsair XMS3?

post #1 of 3
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I've bought this memory and I thought to overclock it but my os doesn't boot. I've this timings 9-9-9-24-2T and when I try other lesser values for example 8-8-8-24-1T it doesn't work? I've also try to up the clock from 800 MHz to 810 Mhz but my os doesn't boot either. In fact it doesn't boot at all when I up the ram clock. I'm just wondering if this memory is any good to overclock and I'm doing something wrong? Here is what I have: 8GB Corsair XMS3 DDR3-1600 DIMM CL9 Dual Kit (2x4 GB) Model Nr: CMX8GX3M2A1600C9. I've ovcerclocked my CPU to 3450 Mhz. 1,45 v, 330 cpu clock, 2,3000 nb clock and 660 Mhz DDR3 with 9-9-9-24-2T. Can it be bios related?
Edited by Recursion - 4/28/12 at 2:40am
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Western Digital Western Digital Samsung Seagate Barracuda 
Optical DriveCoolingCoolingCooling
LG DVD-RW DH16A1L 140 mm Cooltek fan Noctua NF-P12 premium fan Noctua NF-P12 premium fan 
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post #2 of 3
Quote:
Originally Posted by Recursion View Post

I've bought this memory and I thought to overclock it but my os doesn't boot. I've this timings 9-9-9-24-2T and when I try other lesser values for example 8-8-8-24-1T it doesn't work? I've also try to up the clock from 800 MHz to 810 Mhz but my os doesn't boot either. In fact it doesn't boot at all when I up the ram clock. I'm just wondering if this memory is any good to overclock and I'm doing something wrong? Here is what I have: 8GB Corsair XMS3 DDR3-1600 DIMM CL9 Dual Kit (2x4 GB) Model Nr: CMX8GX3M2A1600C9. I've ovcerclocked my CPU to 3450 Mhz. 1,45 v, 330 cpu clock, 2,3000 nb clock and 660 Mhz DDR3 with 9-9-9-24-2T. Can it be bios related?

Yes it can be BIOS related or other issues. You can check for a newer BIOS and also e-mail tech support from your mobo maker and Corsair.

It also depends on the CPU that you are using. RAM on AMD Denebs tend to run up to ~1600 MHz. reliably. Thubans tend to allow the RAM to run up to ~1800 MHz. reliably and FX CPUs will run RAM as high as ~2400 MHz. stable.

Try running Memtest86+ from a floppy, CD or flashdrive at the default settings then slightly OC'ed with looser latencies and slightly higher frequency. If this works then the RAM is not going to run with tighter latencies - which are of no real value above ~1333 MHz. anyway.

XMS can be lower binned RAM but no one has shown this to be the case so all you can do is try to see what the RAM will function at. you can definitely slow the latencies to up the frequency but neither will produce tangible improvements in real apps even though they do show gains in synthetic benches. See the link below for more details on frequency vs. performance gains.

http://www.overclock.net/t/1237178/is-o-cing-my-ram-worth-the-trouble/10#post_16866022
Edited by AMD4ME - 4/28/12 at 5:31pm
post #3 of 3
When OCing RAM you may have to up the RAM voltage or the CPU/NB voltage a bit. When playing with timings, it's usually good to only lower one number at a time. With some RAM the high the speeds may want higher timings.
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Hurricane Venus
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