Switch PC on, occasionally won't POST

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Joined
14 Jan 2013
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Location
Horsham
A few months ago I would switch my PC on & get no POST.

I would have to press the reset button for it to POST second time round & then find 4 WHEA-Logger errors in event viewer.

Reported by component: Processor Core
Error Source: Machine Check Exception
Error Type: Internal Timer Error
Processor ID: 0, 2, 4, 6
Event ID: 18

Back then I had recently experimented with OCing my monitor (60 Hz to 65 Hz lol) so put that back to default & the issue seemed to disappear.

Last night the same issue came back so I'm wondering if the monitor business was a red herring. I removed the power to my PC for the night & let it charge down but the same has happened today again.

Any ideas?

I'm OCed to 4.0GHz with 1.35 CPU + QPI. The only changes my PC has gone through lately is a new GTX 970 + DELL monitor in the last couple weeks & more use than usual
 
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