^ The O/C 4890 would beat the GTX 295...
Though I dont have benchmarks to support the claim, but we all know that a GTX 275 SLI beats the GTX 295...and HD 4890 crossfire has similar performance of the GTX SLI...And a O/C HD 4890 would perform very similar to GTX 285 stock...
So HD 4890 might beat the GTX 295 O/C...
But sure the power consumption of the HD 4890 O/C would be pretty high compared to the GTX 295 O/C and would give out more heat...
But I maybe wrong though about the performance...Others do post your views...
Actually, an overclocked Radeon 4890 to 1ghz is only about 1-4% behind an overclocked GTX 285 as the 4890 has a higher peak overclocking ability.
In the GREEN corner Nvidia GTX 285 (OC to 720Mhz from 648Mhz)
In the RED corner Ati Radeon 4890 (OC to 1.0Ghz from 850Mhz)
Call of Duty World at War
Max everything 4 x MSAA
1680 x 1050 resil
GREEN : 45.0 avg fps
RED : 40.9 avg fps
1280 x 1024
GREEN: 28.7 avg fps
RED: 26.6 avg fps
1920 x 1080
GREEN: 15.9 fps
RED: 15.0 fps
(ATI WINS at this resolution)
1280 x 1024 Resil
8 x MSAA
GREEN: 69.2 avg fps
RED: 70.1 avg fps
8 x MSAA
GREEN: 58.5 avg fps
RED: 58.1 avg fps
This is comparing Nvidias single most powerful card (non duel card based) VS ATIs most powerful card - both overclocked to near their maximum capability (the ATI 4890 is sold factory overclocked to 1010Mhz )
The 4890 is a BEAST for its price in comparison to the GTX 285