There are lots of new cards around $150, you don't need one that's years out of date with low performance and high power consumption. Something like HD7750 ($100) or 7770 or 7850 or GTX650ti would be a big improvement. I initially got a 7750 to replace my 8600GT and it was 10 times more performance, 4 times more memory, whilst consuming less power and was half the price of the 8600GT 7 years ago.