Thanks for the tips so far
[EDIT] Still crap, 1 card on its own does 1.2v but when together I have to lower it. Any safety features you disabled? Im at the point I want to throw them in the carbage bin
I've switched ground this morning and ran one test with Epower v1 on stock voltage(1.2v) and no problems with booting and I could easily run a benchmark. Last time I tried with 1.2v it wouldn't even boot or run a benchmark. I brought the wrong evbot with me so couldn't test higher. More testing later today.
I'm out for now. Epowered card is working like crap. When I up the voltage just above stock it will crash drivers or not boot even... Probably missing something, but not really my field of expertise.