Ive some sort of weird thing going on guys. Maybe it's a hardware failure of my motherboard but not sure yet.

I tried to OC my system in all sorts of ways and I had a lot of issues. I had hard times getting things stable, tried both other multipliers and HTT.

However, Ive always set Vdimm straight upto 2.16, since that's the max Vdimm to run its specs, so to be safe I just set it that way to rule out the RAM.

Now I set my Vdimm to 1.80 and only used multipliers to OC and got 3.8Ghz 2h OCCT stable.

Does this mean that PhII's dont like much higher than 1.8Vdimm's? There's however another eventual explanation;

This board and a 9950BE had at some point an issue because I accidentally inserted on DIMM incorrectly (one side wasnt 'locked'). Since then all 4 DIMMs (other then Ive now) gave a C1 error, or one wouldnt be read (all 4 inserted but only 3GB read) etc. I thought the IMC was damaged and RMA'd it. However, I just got a mail from the shop saying they couldnt find anything after a week of testing. This could mean two things, either I didnt check correctly and one/two DIMMs are indeed damaged or the motherboard has somewhere an issue

Before my move to WC I used another board where I couldnt get much more than 3.7Ghz stable, used high 2.16Vdimm back then. However 3.7Ghz was stable and it was on air. I couldnt get 3.7Ghz stable in above situations but now I lowered Vdimm Ive even 3.8Ghz stable. Hard thing to tell whether I couldnt get much more than 3.7Ghz on the previous board + air due to the Vdimm or just because it was on air and was almost hitting the 50's.

Did anyone experience any lower OCíng with 2.15-ish Vdimm? Or does this really sound like my motherboard is borked, although would the only ~3.7Ghz on air cause of the air? This is confusing, with a lot more testing I could most likely get it figured out, but I'd like to get some feedback running to prevent eventual useless time wasting on testing.