Ok, so i was recently having problems with my evga e-geforce 6600 LE and my ABIT AN8 SLI. First there was no post screen whenever my videocard was in the first PCI express slot, so I returned it and got a Sapphire Radeon x700 Pro. I get a post screen in the first slot with this card, but once i get past the WINDOWS XP loading screen, I get "IRQL_NOT_LESS_OR_EQUAL" everytime. I've been having many problems with this IRQL thing since my computer was put together a month ago. I even went to Fry's electronics to change my motherboard. Got my motherboard changed, still have problems. I've also ran ram tests and seem to have found no errors. I also bought a power supply adapter to fit into my 24 pin motherboard. I can never seem to get my computer working right. Help?