RV790 will at the end, end up as a slightly faster version of RV770 chip with some slightly improved shader performance.

The 850MHz core clock will let the card score a bit higher than the current Radeon 4870 but it will probably give a new sales breeze to ATI's partners. The 40nm RV740 should come slightly after and it should hit Nvidia hard in its mainstream 9600GT market.

The memory works at 975MHz in real frequencies, or 3900MHz effective in the GDDR5 world, but we are sure that some partners will bring out a faster version of the card. ATI currently only offers reference design cards, but give it a few weeks and partners will start coming with their own cards.

Radeon HD 4890 should come out in the second week of April, and the 1GB version should sell for €249.