Power related issues are generally 'compatibility' (between hardware and OS) related.
That said, having any abnormalities (overclocking or having unneeded components, peripherals connected) while troubleshooting any type of PC problem is not desirable to say the least.
So, for that reason, until you find the actual culprit, whether OC'ing has any negative impact or not, it would be smart to return those settings back to normal first...
~TL
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