I'm not very good with PSU and reading the stuff on the power supply so I have no clue if my PSU can handle either of those 2 cards. Anyway, since I have no clue what to look for, I'm going to type out what's on the sticker of the PSU so that someone with more knowledge can tell me if it's enough, or should I upgrade my PSU as well. Brand Hipro (it's a pre-built HP m7664x) DC Output: +5v=/25A, +3.3v=/18A, +5VSB=/2A, +12V=/19A, -12V=/0.8A +5V and 3.3v Shall Not Exceed 175W +5V and +12V Shall Not Exceed 268W Max Power Output 300W So, should I upgrade my PSU for one of those cards, or am I safe? If not, any good recommendations for the PSU? I want to save money on the electric bill too. Oh, and which is better, 3850 or 8800GS? I know the 9800GSO is the same thing, but seems like people want to get rid of their 8800GSes and have dropped the price to 99 bucks.