#Ati amd radeon hd 6800 specs professional#
Note that ATI trademarks have been replaced by AMD trademarks starting with the Radeon HD 6000 series for desktop and AMD FirePro series for professional graphics.
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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).ATI still claims that the HD 6870 has up to twice the tessellation performance of a HD 5870, however. This means that while Nvidia’s Fermi GPUs have tessellation units galore (one per SM, with three or four SMs per GPC and one to four GPCs per chip), a HD 6800 GPU still only has one. However, we expected a little more than the incremental updates of Barts’ tessellation engine, which only offers better thread management and buffering over and beyond the tessellation unit of the HD 5000-series.
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The HD 6870 1GB has a clock speed of 900MHz and is complemented by 1GB of 1,050MHz (4.2GHz effective) DDR5 memory while the HD 6850 1GB has a frequency of 775MHz and 1GB of 1GHz (4GHz effective) GDDR5 memory.In comparison a HD 5850 1GB has a clock speed of 725MHz and 1GHz (4GHz effective) GDDR5 memory.Ī New Front End?With tessellation one of the stand-out features of DirectX 11, we were expecting ATI to add more grunt in this department, and our expectations were duly met.
#Ati amd radeon hd 6800 specs upgrade#
This upgrade is combined with much higher GPU frequencies to deliver more performance – this is despite HD 6800 GPUs using the same 40nm manufacturing process as the HD 5000-series. The total number of stream processors in the Barts GPU is 1,120, the same as a Radeon HD 5830 1GB, but the Barts design has an upgraded front end to keep those stream processors working.
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These stream processors follow the VLIW5 (Very Long Instruction Word, 5:1 ratio) configuration of having a super stream processor for every five basic units, with this unit capable of double-precision floating point operations and other high-precision maths. Or possibly it’s a bit of both.Įither way, the bulk of a HD 6870 1GB looks very familiar to anyone who knows their ATI hardware – there’s a huge bank of SIMD (Single Instruction, Multiple Data) engines with 80 stream processors each. This is possibly a sign of GPU design and production maturing and trying to avoid lengthy delays on new products, or perhaps it’s just that we’re getting to the point where manufacturing shrinks are so complicated that we won’t see the rapid shrinking of the mid-Naughties. After all, even Intel doesn’t take on the project of designing a whole new architecture as well as proving a new manufacturing process, and yet the GPU world has been doing this for years. In fact, the Barts design of the HD 6800 series (right) is fairly conservative – an effort, no doubt, to deliver the chip on time and to a particular budget. The Barts design, also known as the Radeon HD 6800As an upper mid-range GPU, the HD 6870 1GB hasn’t got an eye-watering number of stream processors or a completely bonkers level of tessellation units.