I'm testing a gtx 780 and i find some strange problem with the same usual O.S.
on xp sp3: with every hwbot version 2.25-2.26-2.27 the program start, i select the priority and affinity and run benchmark after few second of black screen appear the error code: EXCEPTION_ACCESS_VIOLATION
on 7-64bit (with or without SP1): with every verion 2.25-2.26-2.27 the program start, the benchamrk start, but after the bench the application disappear and don't pop out the result. I've check the process, and the hwbot process is still on execution.
I tryed to change the vga with a gtx 560 and with same driver same install i've no problem