RV670 will be a mainstream part that ATI plans to offer from November, but there is someething that Nvidia doesn't expect from this chip. The RV670 specification is actually an improved version of the R600 design with PCIe 2.0 support and Shader model 4.1 support, but the chip will be almost as powerful as the R600.

The only thing that won't be as good as the R600 is the memory controller which is cut in half. The new RV670 will feature a 256 bit memory controller but it will have faster clocks to compensate.

At the end we expect a bit slower card than the original R600 at $199 to $249 prices and this might get Nvidia to start worrying.