My setup is Asus P5Q-PRO, Intel e8400 (3.0GHZ - 333*9), OCZ DDR2 PC2-8500 Platinum 4GB 2x2GB set, GTX275 and a 620W PSU. I've been trying to follow the OC guides here on the forums, but as this is my first time trying to overclock, it would seem I'm missing something. If I set my FSB from 333 to 340, everything seem to stay stable. But set it to 350, and I get a BSOD when windows starts loading. Here is the stuff from CPU-Z, ignore the Core Speed and Multiplier, I enabled C1E and Speedstep as I couldn't get anywhere with my overclocking attempts. I think it could be something with the memory, but I really don't know. http://koti.mbnet.fi/john_edw/misc/cpu_z_thingan.PNG You probably get these threads all the time, but I just can't seem to figure this out myself.
What voltage did you set your ram to ? I take it you manually set it to 1066, cos like most 1066 stuff it shows up as 800 in CPU-Z.
It's 2.20V. I had to manually put that, and also set the ram to DDR2-1066 and set custom timings because the motherboard didn't set them correctly when using Auto. I got the timings and the volt amount from OCZs site. Could that be the problem ?
Well I would suggest trying 2.3, but you might break something. Reason being, the Asus P5Q tends to undervolt the setting it says its using. What does the PC Probe readout say ? The software you get with the board...
Doh, I found the problem. Because the BIOS wouldn't detect my RAM correctly, I had set it manually to DDR2-1066MHz. Even though it says DRAM Frequency, it changes the FSBRAM ratio, so when I had FSB at stock, 333, the DDR2-1066MHz setting was FSBRAM ratio of 5:8, RAM at 533MHz So with FSB of 350, my ram was trying to run at 640MHz, not 533MHz After upping my FSB to 350, the DDR2-1066MHz setting changed to DDR2-1120Mhz, so I just set it to Auto. That set it to 1:1 ratio, but at least it worked. Currently I'm running at 400FSB, 3.6GHz, Vcore 1.25V and FSBRAM ratio of 3:4, and everything seems to work great I presume that 3:4 ratio and 533MHz is faster than 1:1 and 400MHz ?
