CPU overvolting/voltage fluctuation

[lawngnomeman]

I just noticed a week or so ago my CPU voltage was fluctuating and getting way too high, like 1.46-1.7 volts. I tried manually overriding the voltage in the bios to lock it to 1.35, this made it go up to 1.6v even though the setting was saved as 1.35. If I leave it at default auto setting it will boot, but the voltage will dangerously fluctuate. I tried using different bios revisions all with the same outcome, so that leads me to believe it is a hardware issue. I'm having trouble figuring out what component is causing the issue. I have a spare PSU I was thinking of swapping in to see if that fixes it. Anyone have any idea what it could be though?

My hardware is as follows;

Mobo: Asus ROG Maximus VIII Hero Alpha

CPU: Intel 6700k with a 280mm AIO cooler

PSU: Corsair HX850i

Graphics: GeForce GTX 980ti with a 280mm AIO cooler

RAM: G.Skill Ripjaws V 2x8gb ddr4 3200mhz

And 2 HDDs and 3 SSDs

 

[lawngnomeman]

Also my OS is Windows 10 Pro 64 bit. And my CPU was not running an overclock at the time I noticed this issue (it's been overclocked in the past but not currently). Most of the parts in my build still have warranty on them (but only for another month) so I'm trying to pinpoint the issue while I can still send parts out under warranty.