IC7 - Bios revision matter?

[ewitte]

I'm running 1.5 BIOS at the moment. Are there any known issues with this version? I have trouble overclocking high at all. My "Game Accelerator" options are auto,auto,auto,disabled,disabled. Memory is set to SPD. I have the Mushkin PC3500 now. At about 220FSB I get Prime errors. Its stable even at 225FSB otherwise. (except for a few games that crash even at stock speed?). I tried 5:4 and 2.7v for my memory. That did not work. I upped the voltage from 1.525 to 1.6 and that did not help. At 235-240FSB I do not even post. I even upgraded my Power Supply from an old Antec 350 to a new True430. Temperatures are fine for temporary cooling. They start off around 45C. If I clock low enough to run prime stable for a long period of time it maxes out around 60C. Over 220FSB it only lasts about 2-3 minutes so it never gets even that high. I'm checking for thermal compound on the North Bridge when I get/install the Alpha heatsink. Could that cause this? Any other suggestions?

Eric