Right now I have power colour radeon hd 5550 1gd3 working fine. However i can get xfx 5770 1Gb GDDR5 for $50. Question is , should i update to that cardand will it be beneficial over my current card? How? Also please note that card is coming cheap as it is out of warranty and accessories. Good thing is it is never used as it was RMA and person bought new card during this period. Please advise as soon as possible.