Originally Posted by BelligerentBill
It must be noted that these tests are run at 1920x1600. At this point you're entering into territory where GDDR5 will consistently outperform GDDR3. Considering the 4890 has to be clocked so high to achieve this given it's theoretical memory bandwidth the value isn't as great as it appears to be. Not to mention that most people do not have a display that is capable of this resolution (most have 1440x900 and 1680x1050). If you're into buying high end monitors with your high end hardware, you're not going to hang onto a GTX 2xx or ATI 48xx long anyways.
That's not true, both 275 and 285 have more bandwidth than the 4890
at a frequnecy of 1.2 ghz, that's 116GB *1.23 or 142.68. That's less than the 285 at stock, and more than the 275 by only 11GB/s (at default). at the overclocked speeds 275 has more bandwidth.
And I chose 1920 because I thought people would complain that anything lower wouldnt be a gaming res. I you look at the 1680 results, you'll see that they're better, more in favor for ATI.