i was thinking of adding another 6950 to my pc i have used extreme calculator and thermaltake calculator and it says recommended psu wattage 479w should i go by this or just keep with 1 6950
More about6950 crossfire 700w
700 should do it if you get a good brand name one.
Yeah I would not recommend getting another card if you only have a 500 w power supply. I would use at least a 850w-1000w if your running two of the cards. Its better to be over your wattage instead of under obviously.