already done it:
Firstly, the H77 had bios problem with the gpu of new family at the time, so they said it worked on their machine and that I had to bios update it.
after the bios update, it crashed ONLY in one benchmark:
It's open GL, it's via kombustor, and thus, they didn't "identify" the problem,
here are two screen shot:
This is the test and test preset,
and this is the error I get.
Basically they made me understand that the card passed their test (3d mark, unigine, and OCCz, if I recall the name of the program correctly) and that they won't do any other test, so I took it back.
Either using a overvolted bios, or by adjust the core clock of -13mhz, help passing that test.
Also the card itself doesn't overclock much, usually it runs at 1201mhz, can reach 1240ish without crashed, but only in 3dmark and such.
I just disassembled everything because I saw some weird cpu temp, found out a cpu cooler screw hole brachet was broken...
Menaged to fix it, and while I was at it, I repasted and re-inserted the GPU, now it works at 16x speed yay!
Time for some test.