yeh fair enough, it is a completely different architecture and the load could be significantly different.
I take it you've tried different OS and so forth.
If you can do x265 you should be able to do R15 at the same clocks. At least for intel anyway.
Are you busting paste or something?
Can you crack paste on AMD?
I also feel like you over tighten the crap out of your pots man. have you tried a looser mount?
out of interest, any dead cards?
I've just knocked the bios switch off from my card and would love if you happened to have a spare I could solder back in place?
also out of interest, what voltage was the testing done at?