I have a wavemaster too, and im going to get a 8800card aswel. All I can say is if your temps are quite cool atm you sould be ok. My temps are atm mo with a x1900 card. Case is 25c, Cpu is 28 -32c, and graphics card is 40c. There all idel temps, so I thing I will be fine with a 8800 card or higher.