i have a 5770 and its working great for me, right now ATI is the only manufactorer with graphics cards that support directx 11. it also gives you more for your money. a 5870 is more powerful than a GTX 295. if you really dont want an ATI card then i'd get a GTX 275 or 285. the 295 is overpriced. what is the CAS latency on your RAM?