Firstly my specs.
P5Q Pro (BIOS latest from Asus)
2x2Gb DDR2 OCZ Reaper 1066 http://www.ocztechnology.com/ocz-ddr2-pc2-8500-reaper-hpc-4gb-edition-eol.html
I'm trying to OC this board for the first time after receving it as an replacement for my old busted MSI one. Sadly I ran into a wall immediately. I just can't get the memory stable no matter what.
I know this particular CPU chip OC's well since I ran it at 3.8GHz with my old inferior mobo and even then it was only limited by my former 800Mhz budget memory. Also I just tested this Reaper memory stick by stick with Memtest86+ (3 passes and about one hour per stick) on stock settings and it gave no errors. So I'm pretty sure the fault is in my bios settings.
I started to OC with the steps in this post: http://www.overclock.net/t/773046/official-asus-p5q-pro-turbo-pro-turbo-owners-club-all-asus-p45-mobo-owners-welcome#post_9952617 and started to search max settings with 6x CPU multiplier to eliminate the CPU that out of the equation.
The problem, in nutshell, is that when I reach the point in the process when I have to start tweaking the memory settings it immediately becames unstable if I touch any of them. If I touch the divider, FSB strap, frequency or memory voltage it just BSOD's blend test immediately. Small-FTT test is always fine. With 400 FSB, I have tried 1:1 and other dividers while keeping the frequency underlocked or just slightly overclocked, I have tried both 333Mhz and 400Mhz straps, I have tried memory voltages between 2.1 to 2.3, I have tried NB voltages from 1.16 to 1.3, and VTT voltages from 1.16-1.35. Also very first I tried as much as possible on [auto] but no luck: The memory just doesn't stay stable with higher-than-stock FSB regardless of if its underclocked, overclocked or stock speed.
Any tips? Is there some major setting I have overlooked that totally hinders the memory from being stable?
Edited by Foucault71 - 4/10/12 at 11:26am