As the title says - I've hardly used my new build since fitting water cooled 780's in SLI in replacement of my 7950's. With neither PrecisionX or Afterburner installed I have 100% system stability - zero problems at all. As soon as I install either of those two programs I end up with blue screen stating Driver_IRQL_Equal_OR_LESS_THAN (or words to that effect.) 
Have tried various drivers as well to no avail.
And I know they are fast enough at stock - that's not the point
Any ideas why my new build hates me? Also occasionally when I turn it on it will start to boot and then go off and restart - always boots the second time and doesn't happen more than say 1 in 5 times. Someone said this could be PSU related - Could that be linked to the BSOD?
Any help appreciated.

Have tried various drivers as well to no avail.
And I know they are fast enough at stock - that's not the point

Any ideas why my new build hates me? Also occasionally when I turn it on it will start to boot and then go off and restart - always boots the second time and doesn't happen more than say 1 in 5 times. Someone said this could be PSU related - Could that be linked to the BSOD?
Any help appreciated.