Pc crashes at idle
I know this is like the 4th thread I have created with my overclock issues. I'm getting increasingly frustrated at this point.
I have an i5 4690k overclocked to 4.5ghz at 1.3v (1.32v underload). It is stable. I ran AIDA 64 for 6 hours followed by another 7-8 hours over night. Never crashed. It plays games fine too. Runs fine with bf3/4, DCS World, arma 3, etc.
My problem is, it crashes after about 15 min on idle and brings me to a screen that says "Your previous overclock settings have failed. Settings reset to default. Press f1 to enter setup..."
No matter what clock setting I have my cpu set at, it always does this. I've tried changing the v-core up and down and set it at auto, override, and adaptive. Same issue everytime. I even used the overclock genie and it set it at 4.1ghz at I think 1.12v. Stable, crashes on idle.
I have Intel c support disabled
I have turbo disabled
I have PCI clock to 64
I don't know what else to do.
My guess is that your motherboard's voltage/ratio curve is the root of the problem.
If Intel Speedstep is enabled (something that you want for power saving), it will lower the multiplier when the cpu is not being used. Your motherboard will also lower the voltage supplied to the cpu, and if it drops below the stable threshold, your computer will destabilize and crash. The voltage/multiplier ramps are set by the motherboard manufacturer to cover the profiles of a vast majority of cpu's (as I understand it, this is how this works), but maybe your cpu needs more voltage at a lower multiplier.
Try setting an adaptive overclock with 1.270V as your "OC voltage" with an "offset" of +0.030V. This will shift that voltage/multiplier ramp upward so that it supplies ~0.030V more at any given time, and when you're at load, it will be roughly (if probably over) 1.3V. For a pictorial explanation of how this works, check out this thread: http://linustechtips.com/main/topic/187959-z97-adaptive-voltage-setting/
Let me know how that works. You may need to apply a bit more offset voltage, but 0.030V should be sufficient. I had this problem with my overclock, and increasing the offset stabilized it.

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