Was able to locate a Sapphire 5850 and installed it yesterday. Graphics are noticeably better / smoother in all games; even with setting cranked up. Only gripe appears to be with pc boot-up. For some reason, now my pc takes a good 45-50 secs after I hit the power button, to post and begin load into Windows. Never had this before. I've rechecked the card and all cables. Am using a Corsair tx-750W power supply which is support and should be sufficient. Curious are other users with this card experiencing the same thing? Do I have a defective card?