Quadro 4000 (mac) bootcamp issue

Hey Im running a quadro 4000 on my mac pro and I’m having issues in my bootcamp partition running windows 7, were it won’t wake up from sleep or screens won’t turn on at all, some issues in general with it booting up properly and sometimes screens go black… any ideas… from what i see people have been running this with and since the latest drivers people seem to be happy… just can’t seem to get much performance out of mine.

All ideas welcome thanks for any thought or ideas :)