if they're not going to be faster there would be little reason to give them so many more SPs and TMUsOriginally posted by: Crisium
I'm guessing 5750 will be slightly faster than 4850 but slower than 4870. Then the 5770 will probably be about equal to 4870, perhaps better depending on it's exact specs. But I cannot see 4890 performance with 128-bit at 1120SP.
IF the bandwidth is a severe limitation, it still wouldn't call for a sweeping judgement like that. I'd still be confident in the 5700s being at least equal if not slightly faster across the board on resolutions of 1680x1050 or smaller (especially on newer games). The key resolution will be 1920x1080 though. I think that is going to be a common resolution for new buyers and ATI might have shot themselves in the foot a bit here. Although, the % increase in memory bandwidth from the 4850 to the 5700s is roughly equal to that of the % increase in pixels of 1680x1050 to 1920x1080. Its also possible the memory controller has been improved and is more efficient with the bandwidth, so I wouldn't be surprised if the 5700s were faster across the board at that resolution.
again, this assuming current rumored specs and pricing