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Odd problem, anyone can solve? :/

post #1 of 14
Thread Starter 
Hello!

I've been OCing my trusted old Q6600 since I got myself a prober cooler now, Venomous X, and I've ran into an interesting problem.. I've been able to OC my cpu up to 3.735mhz with Prime95 12h stable and IBT 12h stable. 9x415 also means I got my memory @ 828mhz with 1:1 ratio. Now here's the problem I have: Everythings great, no bsod or anything but with the same memory mhz BUT my cpu at around 3.1ghz I have better performance in games. I would think that the 3.7ghz OC would give more FPS so I turned towards my memory. Ran memtests on both OCs and noticed something wierd...

Memory transfer rate according to memtest with 3.1ghz cpu OC is 3400mb/s and with 3.7ghz it is 2400mb/s.. So you see, it is alot of difference and it really effects the performance.. Both are identical OCs except for FSB speed and ram ratio.

Anyone have any idea wth is going on? I know most would think that it's cause the OC isn't stable at 3.7 but to me it would look like that with 12h runs on both prime and ibt..
Edited by DJEndet - 5/28/11 at 7:18am
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post #2 of 14
if you get less performance, generally that is a sign of instabaility in somehting, it could also be yoiur memory being unstable. Personally i would try it with a few lower clocks, ones above 3.1 but below 3.7 to see which gets the best performance, then stick with that. just my 2cents
post #3 of 14
Thread Starter 
Quote:
Originally Posted by Kevlo View Post
if you get less performance, generally that is a sign of instabaility in somehting, it could also be yoiur memory being unstable. Personally i would try it with a few lower clocks, ones above 3.1 but below 3.7 to see which gets the best performance, then stick with that. just my 2cents
Yah well been trying to test out different clocks now ranging all between 3.1 to 3.6 and the one I posted earlier works best.. Freaking wierd since if I put memory to 800mhz at 3ghz the memory drops down to 2400mb/s aswell.. I don't think that little of mhz should affect the memory by that much. Even at stock speeds (just tested while typing this post) the memory rate is 2400mb/s... O.o
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post #4 of 14
Have you tried tinkering with the memory timings?
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post #5 of 14
Quote:
Originally Posted by Truambitionz View Post
Have you tried tinkering with the memory timings?
try this too, actually in BIOS make sure there are no timing settings set to auto because the computer could be setting the memory to some outragously loose timing and ruining your bandwith.
post #6 of 14
Thread Starter 
All memory timings set to default by hand so the comp doesn't change them... 5-5-5-18 + the rest which I can't remember the top of me head right now. So yeah, everything is identical in every test, I've even left the voltages to those which keeps my CPU stable at 3.7ghz just to keep everything unchanged between the tests..
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post #7 of 14
that is pretty strange then.
post #8 of 14
Thread Starter 
Ha, figured whats going on... It's my mobo's ram controller. Tested the memories on my friends PC and they run as they should, his memories run bad on my mobo aswell...

Just reverted back to stock speeds for some testing between my q6600 and friends q6600 and the mobo decided to die... 10x quick boots and the comp restarted to windows, noticed that my internet is off. Seems the network adapter died, sound chip aswell. Pleh, had to upgrade my comp anyway..
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post #9 of 14
Quote:
Originally Posted by Kevlo;13665849 
try this too, actually in BIOS make sure there are no timing settings set to auto because the computer could be setting the memory to some outragously loose timing and ruining your bandwith.

OP. But in the sense that lowering them down to 4-4-4- or something and raising the voltage by .1 or something wont bottleneck the cpu when its oced higher?

Something to try.
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post #10 of 14
Try to look in bios under Advanced memory timings and see if you can find a setting called tRD. Another name for it is Performance Level. This control the Performance of the mem. If left at Auto it will loosen itself when you up FSB. So to me it sounds like this could be your issue.

Try your CPU at 3.1GHz, then download Memset 4.1 and look at the Performance Level.

Then overclock your CPU to your max clock again and look at the Performance Level again.

Usually this will vary from 6 and up. Most common when overclocking is 8 - 10. Should not need more then 10. But if left at Auto it can default to 15+ !.

If you cannot find this setting in bios 'tRD' or Performance Level, you can use Memset 4.1 to adjust it. This will greatly affect mem performance.

    
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