Why has my CPU voltage increased over time?

[m0k]

Specs:
i7-8700 (non-k) cooled with Hyper 212 evo
MSI B360i Gaming itx
16GB Corsair 2400mhz
GTX 1080
Corsair RMx 550w (gold)
Bios is up to date and all settings are default.

 

CPU temps never went over 65c but now is approaching 80c

 

When i first built this PC i distinctly remember my CPU would never hit more than 1.298v during sustained all-core boost of 4.3ghz all on its own.
However over the last few months i noticed that now its creeping up to 1.348v
And now over the last few days its regularly going up to 1.398v to 1.404v now…

 

Windows is up to date, Bios settings are all set to default, i haven’t changed anything in there…any ideas?

 

Edit 1: i have cleaned and reapplied and reseated my CPU and CPU cooler

[Haro]

2 hours ago, m0k said:

Bios settings are all set to default, i haven’t changed anything in there

Clear the cmos 

Update the bios and try 

Do you have any voltage offset or anything is  it a static voltage ? 

[bluebuffalo831]

how long have you had the cpu

because silicon degradation could be a part of this

[m0k]

16 hours ago, TofuHaroto said:

Clear the cmos 

Update the bios and try 

Do you have any voltage offset or anything is  it a static voltage ? 

cmos cleared - bios is already updated - no voltage offsets... cant change any of those things on B360

8 hours ago, bluebuffalo831 said:

how long have you had the cpu

because silicon degradation could be a part of this

Bought the CPU brand new Aug 2018 - would that be covered under warranty?