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.
Are you able to test it at all? Those types of cards were hot and heavy when Bit-Coin mining was big. The card may have been beaten to death by constant mining.
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.