Computer only shuts down when IDLE when I overclock

Hi, I have an issue I cant find answers for on Google. Basically when I overclock my CPU, an i5-3570k, everything technically runs stable and I never get any crashes or anything when the CPU is under heavy load. But when I leave the computer alone and am AFK for like 20 minutes, then the PC will automatically shut itself down. When I look at the computer's activity log, it basically says that it doesn't know at all why it shuts off, I also have the computer set to never sleep. This only happens when I overclock my CPU. I find it interesting that the computer only shuts off when its idle instead of under heavy load.

I do overclocks like 4.4ghz at all sorts of voltage ranges and this still happens, whether I'm at 1.25v or I'm at 1.3v, i tested all of these voltages to see if theres a difference but there wasn't. Same goes for when I overclocked 4.2ghz at 1.25v. I have reformatted my operating system several times and have done switches between windows 7 and windows 10 but the issue still exists.
Reply to Max Powers
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More about computer shuts idle overclock
  1. Hi,

    Did you disable power saving, sleep and hibernation?
    Reply to dextermat
  2. dextermat said:

    Did you disable power saving, sleep and hibernation?

    yes, all of those are disabled
    Reply to Max Powers
  3. It's probably one of two things.

    Too low voltage when idle that can be fixed within the bios (tell us your motherboard model)

    If it shutdowns on exactly a certain idle time, then it's a silly windows power saving thing.
    I had that problem with my sister's pc and even though every idle-ish windows setting was disabled, I had to reset their settings to default, save them and then re-edit them to disable the relevant power saving options.
    Reply to Maebius
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