Question Prime95 Large FFT Failures, Windows Rebooting

[Sweetdeal]

Hey guys,

since an while my PC started to randomly reboot when I entering Desktop (after Booting) or sometimes when I load up to many things to fast.

Other then that, the System runs Stable and I can game for Hours. But as I said, sometimes directly after boot it reboots.

So people told me it could be my Memory be broken.

I tested Prime95 Large FFT now and 4 out of 12 Cores crashed with Hardware Failure detected.

So could this be an Voltage thing? Or is my memory or even the Memory Controller possible broken? Is there a way to test that out?

I running: 8700K - Hero XI Mainboard + https://www.corsair.com/de/de/Kateg...r/DOMINATOR-PLATINUM-RGB/p/CMT32GX4M2C3200C16

I tried to raise the RAM Core to 1.4v or changing 3466 to 2800 etc.

But it seems nothing really works, so curious if someone can give me some tips?

 

[alceryes]

Remove all overclocks and voltage adjustments. Leaving only XMP and the default Intel turbo boost on for now.
Start with booting off a memtest86 USB to verify memory stability.

 

[Sweetdeal]

The thing is, I feel it started to happen once I had an Outage of my Waterpump or the BIOS Update not 100% sure.

My Hero XI Mainboard has an Memory "OK" Function, I noticed every reboot it put VCCIO to 1.25V same as the other voltage.
I fixated the Voltage to 1.2 V now and put the RAM Down to 3200. It seems to run stable now. I also disabled the Memory OK Function, so it won't overwrite on every reboot.

PS: I also used MemTest before with unstable in Prime95 but MemTest never shown Errors.
Sad part is, I using an very limited RAM Kit, that is only available 100 times on the World, which makes the Comp ability awful =/