overclocking and fail to boot

[Xenos]

Hi all

I have been trying some oclocking with limited success but at one point while trying to push past 3.06Ghz I oviously made a setting adjustment in bios which caused a boot failure. Can anyone tell me how to get back a boot so that I can get into bios and change that setting. I hope that I have not wrecked the thing because I am fairly new to overclocking.

 

[nanaki333]

clear the cmos with the jumper near the battery. should reset everything back to defaults.

 

[Xenos]

Thanks nanak, will try it soon as I get off from work. Think I should find it in the mobo manual, or do you have a particular procedure. Mobo is D975XBX2. Got another question. Am using 800mhz, 2Gb of memory, and E6600. I understand 1:1 ratio is the ideal which I would achieve at 400 fsb setting x9 the multiplier. But I have my reservations about 3.6Ghz stability so 3.2 would suffice for me. How can I achieve this and still maintain the 1:1 ratio or is this absolutely necessary.

 

[Mattz0r]

You can drop your multiplier down to 8X, and maintain the 400FSB, which would give you a 3.2GHz clockspeed (assuming you want to maintain the 1:1 ratio.) Maintaining a 1:1 ratio isn't really that necessary though; high FSB with high clockspeed are king

 

[Xenos]

Thanks Matt but my multiplier is locked at x9 on the E6600, at least there is no where in bios that I can see where it can be altered.

 

[JustaGeek]

If your MB has a feature called Crash Free BIOS (ASUS term, perhaps something similar in other manufacturers' MB's) press the Reset switch during boot - it should return the settings to the pre-OC state.

Otherwise - clear the CMOS.

 

[Xenos]

Thanks everyone
Up and running again, clearing the cmos did it, now back to the ocing thing. Carefully shooting for 3.2Ghz stable. What's the best stress tester? I have prime95 downloaded so far.

 

[ChronoReverse]

Look for the Prime95 beta (25.4). It'll run Small FFTs on all your cores at once. Small FFTs == massive heat.

 

[nullpointerus]

Doesn't Prime95 itself say that Large FFTs produce the most heat (and consume the most power)?

I've always used the Large FFTs for initial stress testing while overclocking.