After RV670, AMD will continue to announce mainsteam GPUs, the RV635.

The existing RV630 will begin to shift to RV635 in 08 Jan. RV 635 is a 55nm, DX10.1 Shader Model 4.1 supported chip, also supported PCIe Gen2. Will be named as HD 3600 series.

the RV635 also the same as RV630, intergrated with 24 Stream Processors, 120 Stream Processing Unit(ALU), 16 Texture Address Unit, 8 Texture Filter Unit and 4 ROP. It have a 128bit memory interface, can equip with DDR2, GDDR3 and GDDR4. The highest core frequency will be 800MHz.

Now it’s sure that RV735 will have XT and Pro version:

ATI Radeon HD 3670: RV635XT, 800MHz/1.6GHz(core/mem)

ATI Radeon HD 3650: RV635Pro, 600MHz/1GHz(core/mem)

The final Version will ready in middle Dec, and hit the market at 08 Feb.