AMD To Launch Radeon HD4890 "RV790" In April

[marten_larsson]

Higher clocks and lower FPS? Seems like a possible driver problem for me. Then again, there should be no major changes in the driver area if only the clocks are changed. ...completely different story if the whole shader structure/amount is changed...

Something is wrong there.

It's obvious that there's something wrong or else the 4890 is CPU limited since the fps is capped at 31,6. In FC2 there's 14, 20 and 35% improvement over 4870. In Crysis we see a 8,5% increase with 1920x1200 so...

Edit: With a 35% increase at 1920X1200 it should be competing very well with GTX285 (shouldn't it?!) but that is probably best case scenario.

Edit no2: Comparing the GTX285 with 4xAA and 16xAF and extrapolating the results shown by xbitlabs for a 4870 and 285, the 4890 should end up 5fps faster than the 285 at 1920x1200. Link and calculation 39,5 x 1,35= 53,325. I'm aware of that this really stretching it but the performance figures shows it may very well compete with the 285 at least in some games (more than before).