PC2-8000/780i problem

kissenger · 30 Apr 2008 at 22:45

Can someone help me get the best performance out of my OCZ PC2-8000 memory. It's running at 800MHz now, but I expected it to run at 1000MHz. I'm running a 780i eVGA mobo, a Q6600, and a 9800GTX.

I posted about it in the general hardware forum, but I thought I might get a more comprehensive answer in this forum:

http://forums.overclockers.co.uk/showthread.php?p=11601144#post11601144

Cob · 30 Apr 2008 at 23:21

Unlink the memory and set it to 1000mhz. You'll probably need ~2.1v for that memory (I've 8gb of it running at 2.15v)

kissenger · 30 Apr 2008 at 23:28

Sorry dude, I don't understand what you mean. I've just finished my very first PC build. I don't know anything about 'unlinking'.

I've already set the voltages to 2.1V, but that didn't change anything. Could you explain in laymans terms exactly what I have to do? I would really appreciate it, as me and Crysis have unfinished business.

Cob · 30 Apr 2008 at 23:32

FSB & Memory Config menu, set FSB - Memory Clock mode to Unlinked and enter 1000mhz.

kissenger · 30 Apr 2008 at 23:42

That sounds easy. Is there anything that could go wrong by doing that. I don't want to kill my computer.

Also, is it better to up the RAM from 800MHz to 1067MHz (which is my current FSB speed) instead of going from 800MHz to 1000MHZ. If I do that I'd be going over my RAMs stock speed, but at least my FSB

RAM ratio would be at 1:1.

Cob · 30 Apr 2008 at 23:45

Your FSB speed is really only 266mhz (Intel multiply their FSB by 4).

And you're best sticking to 1000mhz with that memory.

And no you won't kill anything.

kissenger · 30 Apr 2008 at 23:55

Cob said:
FSB & Memory Config menu, set FSB - Memory Clock mode to Unlinked and enter 1000mhz.

You are the man. My RAM is running at its proper speed now, and it only took me a day to figure it out!

Edit: one thing I did notice since restarting my PC with the new RAM speeds is that the temperatures of all four CPU cores and my GPU have all gone up by about 4-5 celsius. To be expected Isuppose

kissenger · 1 May 2008 at 00:40

So, I just ran CPU-Z and it showed that my timings had been bumped up to something like 5-8-8-24 after going to 1000MHz. I presume these can be reduced, as the memory I have ought to run at 2.1V, 1000MHz, and 5-5-5-18 timings. Should I just go ahead and reduce the timings to OCZ specs, or should I leave them at what my computer automatically detects?

Also, its weird but CPU-Z still shows my voltages at 1.8V, and still insists that I have PC2-6400 memory.

Cob · 1 May 2008 at 06:38

Use the Memory tab of CPU-Z, and not the SPD tab.

And yip go ahead and set them to 5-5-5-18.