Son told me about this last night....i7-920 on Asus R2E, 6 GB DDR3-1600 @ 6-7-6-18
System was built and various OC profiles set up in October 09.....running w/o issues ever since last BIOS upgrade. In last 3 days, on a cold boot to the "24/365 profile" , a modest 3.7 Ghz OC w/ all BIOS features enabled and 1.125 Core Voltage, the startup sometimes stops with the OC Failure message offering to set to defaults or enter the BIOS....entering a reloading the same BIOS profile that was loaded when system was shut down works fine.....warm boots work fine but say 1 outta every 2 times it's cold booted, he gets that message and then after loading exact same settings, it boots fine.
Was gonna try upping the voltage a notch but b4 I do, wondered if anyone experienced same experience.
12 hours each under small FFT's, Large FFt's and Blend.....also passes Linx, SuperPi, OCCT and anything else I have thrown at it. Not to mention 4 months of cold starts w/ no issues at same OC. Also this is the plain old 365/24 OC profile at 3.7 Ghz....other profiles go to 4.4 Ghz.
Obviously, you have a stability problem.
If it was a stability problem, I don't think any of these would solve the problem
a) When you see the "Set defaults or enter BIOS" message, just entering the BIOS and not doing a darn thing before exiting the BIOS allows the system to boot normally at the loaded 3.7 Ghz OC profile.
b) Hitting the rest button allows the system to boot normally to the same 3.7 Ghz OC profile
c) Ctl-Alt-Delete allow the system to boot to the same OC profile.
It's as if it's seeing something strange when power 1st hits MoBo it flashes the message and then it's going "Oops, so sorry, I made mistake."
Meybe it's time to reseat everything.....usually do every 6 months...I'm 2 months early.