You're going to have to speak in sentences so we can understand. Use your words. Also give us as many details as possible with regards to your situation so we can best help you.
-"very poor framerate" means nothing without settings and more details on that.
-How much are you willing to spend? Apparently you have no budget so the best upgrade would be to purchase two radeon 5970s and crossfire them for $1400. You also didn't tell us what motherboard you have.
So give us some more details and I'll do my best to help.