Radeon 4890 problems

I just got a new Radeon 4890 last night installed it and everything worked fine, I woke up this morning and heard the fan speeding up then slowing down and had a black screen on my pc I had to remove the card be able to turn my pc back on. I waited awhile and put the card back in and everything worked fine untill I started to load up a game and I got the black screen again and whan I tried to restart it with the card in it just crashes at the windows loading screen. I dont understand why it was working fine last night and works 1/2 the time now. Im a newbie when it comes to the way a computer runs but Im pretty sure my system should be able to handle the card

AMD Phenom II X2 3.1 GHz Black Edition Processor
Sapphire HD 4830 512mb GDDR3 PCI-E 2.0
Gigabyte MA78GM-US2H Motherboard ( Bios has been updated to fit Phenom II X4 965 BE AM3 Processor )
1TB Samsung Spinpoint F1 32mb Cache 7,200rpm SATA II 3.0 Hard Drive
X-FI 7.1 HD Sound Card
Raidmax Smilodon Extreme Black Edition Gaming Case with Lighting Acessories
650w Corsiar 80plus SLI/CrossfireX Certified with Custom Green Sleeves

Any feedback is greatly appreciated thx for your time.
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More about radeon 4890 problems
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  2. Wait, so you're asking about an HD 4830 or 4890? Your specs are a bit confusing. Have you uninstalled all your drivers then installed the new Catalyst 9.11 drivers? It needs to be re-installed to properly detect a change in the 4800 series.
  3. Sorry its the 4890 I meant to take out the vid card in the specs i posted, I did a driver sweep and installed 9.11 and im still having the same issues it worked fine the first night now when I load up my game it crashes and when i try to restart it crashes on the windows start screen and the PC the fan on the vid card just speeds up n slows down and I have to remove the card and do a system restore before I can use windows again
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