I have this dell optiplex 745 desktop computer that I use as a gaming computer. I realized that with this card that I have, I may have the best card that this computer can use, forcing me to have to get a new computer in a couple of years at most. Can anyone tell me for sure if this is the best card for it, and if not, which one is better. Thank you. It has to be low profile, consume under like 70 watts, and draw power entirely from the PCI slot.