CPU running at 50*C idle with AIO cooler

Jun 14, 2018
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The computer's been shutting off randomly when under load and the idle temps are at 50*C and jump from 70-90* under load. Cpu I'm running is an I7-2700k and I've pulled apart my Corsair h100 to check the pump and its working fine. Fans are spinning up fine. My CPU jumps from 0.9 to 1.2V at idle. I reapplied thermal paste last night and still no change.
what're your guy's thoughts. Thanks