Valid question, TemjinGold.
Though from what I've seen on reviews/benchies 5770 CF easily outperforms a single 5850 and can reach 5870 performance or more. Though surely the CF solution is more expensive than a single 5850.
My plan is to get 1 5770 on the coming days (building a new system) and down the road when 5770 drops in price and more demanding titles pop I'll buy another one. So I was wondering if my newly bought PSU could handle em.
Personally I think that 5850 right now is quite expensive (but it definitely delivers). I don't consider my self an enthusiast, just your normal gamer and I don't mind losing on AA/FA to make my titles playable. Though I do want to game at my monitors native res (1920x1080).
TLDR: Right now with the titles I plan on playing I think that a single 5770 will suffice. But down the road I think I might grab another one and I'd like to know if my PSU could handle em.