buying a Radeon HD6990

Solution
Maybe look at something like this, not quite as fast but far more reliable.

http://www.ebay.com/itm/NVIDIA-GeForce-GTX-580-1-5-GB-GDDR5-SDRAM-w-Arctic-Accelero-Xtreme-III-Cooler-/231523167131?pt=LH_DefaultDomain_0&hash=item35e7db2b9b

or this , make an offer to keep it competitive.

http://www.ebay.com/itm/MSI-GTX-670-OC-N670GTX-PM2D2GD5-OC-/201310195727?pt=LH_DefaultDomain_2&hash=item2edf05d00f

For that price range you won't find anything new to compete with these cards. the 6990 is a beast and will require a massive psu to power it's likely quite loud. So try something like I linked above.
Maybe look at something like this, not quite as fast but far more reliable.

http://www.ebay.com/itm/NVIDIA-GeForce-GTX-580-1-5-GB-GDDR5-SDRAM-w-Arctic-Accelero-Xtreme-III-Cooler-/231523167131?pt=LH_DefaultDomain_0&hash=item35e7db2b9b

or this , make an offer to keep it competitive.

http://www.ebay.com/itm/MSI-GTX-670-OC-N670GTX-PM2D2GD5-OC-/201310195727?pt=LH_DefaultDomain_2&hash=item2edf05d00f

For that price range you won't find anything new to compete with these cards. the 6990 is a beast and will require a massive psu to power it's likely quite loud. So try something like I linked above.
 
Solution