AMD Radeon HD 6870 and HD 6850: Leaked Slides Reveal New Details (Tessellation, GPU Computing)


AMD Radeon graphics logo

AMD Radeon HD 6800 series presentation



Obviously, it’s rather hard to keep NDA slides private…

The Radeon HD 6850 has a 775MHz Bart PRO GPU, 960 scalar processors (or 240 vec4 processors, new Radeons use vec4 instead of vec5), a TDP of 127 watts (19W in idle), 32 color ROPs.

The Radeon HD 6870 has a 900MHz Bart XT GPU, 1120 scalar processors (or 280 vec4 processors), a TDP of 151 watts (19W in idle), 3 texture units, 2 color ROPs and 128 Z/stencil ROPs.

In the hardware tessellation side, the HD 6870 offers better performance for a tessellation factor less than 20 (to 20) (which correspond to moderate (X8) and normal (X16) tessellation modes in TessMark).

According to these slides, the Bart XT GPU (HD 6870) has 14 OpenCL compute units (or SIMD in Radeon world). That means that each compute unit is made up of 1120/14 = 80 OpenCL processing elements like in previous HD 5800 series. See this article for more details on OpenCL compute units.

AMD Radeon HD 6800 series presentation

AMD Radeon HD 6800 series presentation

AMD Radeon HD 6800 series presentation
Click to enlarge

AMD Radeon HD 6800 series presentation

AMD Radeon HD 6800 series presentation

AMD Radeon HD 6800 series presentation

AMD Radeon HD 6800 series presentation

AMD Radeon HD 6800 series presentation

AMD Radeon HD 6800 series presentation
Click to enlarge

AMD Radeon HD 6800 series presentation

AMD Radeon HD 6800 series presentation
Click to enlarge

AMD Radeon HD 6800 series presentation
Click to enlarge

AMD Radeon HD 6800 series presentation

[via]


9 thoughts on “AMD Radeon HD 6870 and HD 6850: Leaked Slides Reveal New Details (Tessellation, GPU Computing)”

  1. Psolord

    Smart Tesselation or Brute Tesselation? That is the question! 😛

    If Smart comes with considerable power savings, while keeping image differences indistinguishable, then I’m ok with it.

    Let’s see what Lost Planet 2 benchmark will have to say about this.

  2. filip007

    That’s the new age of graphics and i think that AMD did just that, speed that works overall.

  3. Pingback: Graphics Cards Thermal Design Power (TDP) Database - 3D Tech News, Pixel Hacking, Data Visualization and 3D Programming - Geeks3D.com

  4. Psolord

    Rumor has it that the Barts Radeons are vec5 and the Cayman Radeons will be vec4.

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