I really don't want to be bothered, or spend the money on a new psu, but in the future I think I may get a radeon 6950. I have an athlon II x4 640 and a radeon hd 6850 right now. as well as a corsair builders edition 600 watt psu. would the athlon and 600 watt psu be enough for a 6950?
The PSU can easily handle an HD6950. The CPU will limit it in some games most likely, but it really depends on the specific game, settings and resolution you would use. If at all possible giving it a nice OC would certainly help.