I currently have Crossfired 2 x ATI XFX HD4850 512MB GDDR3. I have wanted to get 2 HD5850s but they are out of my price range. So I was wondering whether I would be worth it to upgrade to maybe crossfired 2 x ATI XFX HD5770 1GB GDDR5? I like the DX11 on these plus i plan on playing games like Crysis 2 and StarCraft 2 when they come out.
Btw, what is the differnce between 128mb and 256mb on a graphics card? Cause my HD4850 has 256mb and the HD5770 has only 128?
Stick with the Crossfired cards until you need an upgrade, and twin HD5770s' will not really give enough of a boost to warrant the expense, they are only a little faster than dual HD4850s'.
I think you are confusing MB with memory bit size.
The HD4850 uses a 256 bit memory connection while the HD5770 uses a smaller 128 bit interface.
While the HD4850 sounds far faster (double the bits), there is little to choose between them because the HD5770 uses GDDR5 memory-which is twice as fast.
More information on your specs is needed, though, fast cards need a fast CPU to keep them fed with data and a small monitor does not need too much graphical power to keep the frames flying.