My XFX 5770's fan started making an awful noise a few days ago so I'm looking at new GPUs (third this year ). Got my options down to a Sapphire 5770 and Sapphire 6850, both 1GB. However, I'm kinda worried about getting the 6850.
I have an OCZ StealthXStream 500w but I'm not sure I trust it with handling a 6850 which seems more demanding than a 5770. I've read the power recommendations for the 6850 and they go from 400 to 600w. They mostly lean towards 450/500 though.
Could anyone tell me if I'm safe with 500w? I have a Intel C2D E8400 with 3GB RAM, can provide more info if needed.
Also, I haven't been lucky with finding the dimensions. How big is the 6850? (UK/EU model preferred)