Overclocked CPU no problems at stress test, no boot at next startup

[JayrollLim]

Hello, I overclocked my Athlon II X2 250(Regor) 3.0GHz to 3.6GHz with fsb at 240 and multiplier at 15x. Saved the bios and it booted. I stress tested it using Orthos and no problems for 12 hours. But the next time I restart or shut down my PC, it just wont boot up. Fans running, lights lit up, but no display. I solve this by pressing the reset button. But when it boots, it displays "overclocking failed". I have no choice but to load setup defaults to boot windows again. What is the problem here?

SPECS: Athlon II X2 250, M4n68T-M LE V2 mobo, 2gb kingston ddr3 1333, FSP Hexa 500w, 700gb WD Green, GeForce 7025 onboard graphics

 

[willyroc]

Sounds like it might be your motherboard. Try overclocking again after your settings are defaulted.

 

[JayrollLim]

Sounds like it might be your motherboard. Try overclocking again after your settings are defaulted.

I've got same results sir.

 

[henydiah]

run memtest : http://www.memtest.org/

 

[JayrollLim]

run memtest : http://www.memtest.org/

what version should i use? i got windows 7 64 bit...

 

[JayrollLim]

Nevermind, I ran Memtest and got 0 errors. But now the problem got worse, I started up my pc to overclock it again, and now it wont boot, I have to run through loading bios defaults to get it booted again. Help!

 

[henydiah]

clear cmos again ... and if overclock try lower ratio from 1333 to 1066 first .. i will help for boot

 

[JayrollLim]

Best answer selected by JayrollLim.