Graphics card problem

Hey Guys,

I have been running my system for a while now with one graphics card (HIS Radeon 6790 Turbo) and it has been going alright, but for my birthday I received another one. I set everything up and plugged in the crossfire and got going. I immediately had problems. Not only was everything graphics related much slower and glitchy, it has been messing with my computer in general. Making it so I can't see anything on my screen until it's at the login screen.

Sometimes the card works really well for a while then an hour later it acts up again.

I already set up an RMA on Newegg to return it, but before I send it I would like some opinions.

My setup:
Antec 1200 Gaming Case
Intel Core i7 920 (OC to 3.8ghz)
Asus X58
Kingwin 1000watt PSU
Antec Kuhler 920
Corsair Vengance 8GB DDR3 ram 1523MHz


Check your PCI E slots....both need to be the 16x16 or 8x8....or PCI E 2.0 vs PCI E 1.1. Both slots need to be the same version and BUS speed.

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