hi, sorry yet another query re upgrading graphics on my desktop pcv rx514 which has a nvidia geforce 4 ti4200 with 64 mb. what would be the best nvidia upgrade which wouldn't involve changing power/pcu/etc? have eyed up a 6600gt but unsure if i can simply swap them over. also seems youcan get lots of nvidias but branded by different makes eg xfx/leadtek/pny/etc. are these all much the same or are there some brands better than others? thanks for any advice, much appreciated.
