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Texture - The rate at which textures can be mapped by the texture mapping units onto a polygon mesh.Pixel - The rate at which pixels can be rendered by the raster operators to a display.Core clock – The reference base and boost (if available) core clock frequency.Core config – The layout of the graphics pipeline, in terms of functional units.Die Size – Physical surface area of the die.Transistors – Number of transistors on the die.Average feature size of components of the GPU. Architecture – The microarchitecture used by the GPU.Codename – The internal engineering codename for the GPU.Note that ATI trademarks have been replaced by AMD trademarks starting with the Radeon HD 6000 series for desktop and AMD FirePro series for professional graphics. Model – The marketing name for the GPU assigned by AMD/ ATI.The headers in the table listed below describe the following:

9.3 FirePro Server series (S000x/Sxx 000).We suspect that the extra power is required to keep the lower grade Barts LE GPU stable our HD 6790 1GB reported a vcore of 1.175V, compared with the 1.094V of an HD 6850 1GB. While part of this will be due to the HD 6790 1GB running at slightly higher clock speeds, the lower stream processor count should realistically negate this. One feature all partners cards will share, though, is the use of two 6-pin PCI-E power connectors, despite the fact that this card sits below the single 6-pin PCI-E powered HD 6850 1GB in AMD’s range. Differences in cooling, power delivery circuitry and PCB design mean each partner’s card could perform very differently when it comes to thermal and acoustic performance. While this means there should be plenty of competition and variety, it means our review sample, based on a stock HD 6870 1GB PCB, is only representative of graphics performance. All HD 6790 1GB cards will require two 6-pin PCI-E power connectorsĭespite the nomenclature gymnastics, in reality the HD 6790 1GB will be placed in the middle of the £30 price gap between the £99 HD 5770 1GB and the £135 HD 6850 1GB, taking on Nvidia’s recently released GTX 550Ti 1GB.Īs was the case with the HD 5830 1GB, there’ll be no stock model for the HD 6790 1GB, with board partners instead given free rein to use their own custom PCBs and coolers.