I'm just struggling with the Vegas.
Doesn't seem to matter whether I increase voltage or lower clocks, after a few minutes mining Monerov8, all GPUs go boom, i.e. SRBminer says hashrate is zero for every single card... and it will fail automatic re-initialisation.

Using 120/16/2. They're all 56's flashed to 64.
Maybe I'm just at the limit of what the PSU is able to cope with... Power draw is between 1400 and 1435 for a EVGA 1500 G2...