Hello i am having some problems with overclocking my E8500 to 500 fsb 8x multiplier. Its a very weird problem. I am using ibt to test my overclock. In a nutshell anytime i reach a "stable" overclock with ibt ( i conclude this by passing 100 times with maximum stress on vista 64) then when i unplugg my power supply and wait several seconds then replug, then i re test with the exact same configurations i end up failing ibt.

My first settings were

fsb 502
ddr is at 503 frequency 5,5,5,15

.200 cpu voltage
.250 ddr voltage (running gskill pc-8500) enough to give it 2.1 voltage
.275 motherboard voltage
.275 fsb voltage
core ref voltage were both at .63
cpu pll at 1.6
everything else on auto.

I tested this configuration and it was 100 percent stable. i tested ibt and it passed 30, 50, and two 100 tests. Then when i unplug my power supply and re test, my cpu requires my fsb voltage to be stable. I have so far risen my fsb voltage to .325 and my motherboard voltage to .300. Cause each time i make a small raise and test i become stable, but whenever i unplug and re test i have to do something different in my bios to make it stable. Not sure whats the problem.

Anyone heard about this before?