Radeon HD 5870: RV870 only an overhauled RV770?
AMD's RV870 GPU, which is intended for the DirectX 11 graphics cards, is said to be an enhanced RV770 rather than a new development.
Regardless of the transition to TSMC's 40 nanometer production process, the RV870, codename Cypress, is said to have "only” 1,200 Shader ALUs - 50 percent more than in the RV770 - that are arranged in 12 SIMDs with 20 groups of five components each. Each SIMD would have access to one Quad TMU so that the whole chip has 48 TMUs. The number of Raster Operators (ROPs) is said to have been doubled - this means that now 32 pixels can be routed to the output simultaneously. Furthermore AMD is supposed to have been able to increase the GPU clock speed to 900 MHz and even 950 MHz for the X2 versions of the expected Radeon HD 5870 and HD 5850 graphics cards.