I had recently built a system in October, and got with it a XXX 4890 from XFX. Well, it recently died on me, so I RMA'd it, but in the meantime, I bought a 5770, which I am thus far very happy with. I am considering selling the 4890, keeping the 5770, or possibly selling both of them and upgrading to a 5850. Is it worth it to get a 5850 or just wait until I need to upgrade and xfire with another 5770? I have to get a different 5770 later anyways because I want to eventually do eyefinity, and mine did not come with a displayport (poor research, quick decision). So I would sell both the 4890 and 5770, get another 5770, and eventually get another 5770 for xfire. How important is the 128-bit vs 256-bit memory?
I am pretty sure you need the same manufacturer and model of cards to xfire, right? Or am I out of my mind? Any advice is appreciated, I am kind of stumped with what to do here. Thanks!