My PNY GeForce 4 Ti 4400 just died on me after having it for a little over a year (getting strange vertical lines/blocks if I let the PC run for more than two or three minutes). I had to switch back to my Prophet 4500 and it's killing me. I was thinking of upgrading to a Radeon 9600xt. Would the performance increase be worth the purchase of a new card or should I just RMA the PNY I already have? Thanks.