That card's got a decent complement of 1,408 stream processors in its make up. It also means that the AMD Radeon HD 7870 also looks a little shader-poor when compared with even the relatively lowly HD 6950. Compared with the 32 CUs and 2,048 shaders of the HD 7970 and the 28 CUs and 1,792 shaders of the HD 7950 that's quite a drop. The HD 7870 has 20 of these Compute Units, making a total of 1,280 stream processors. To make sure it's still gaming-capable though there are four vector units in each CU to make for a combination of its old-school vector processing and the scalar architecture. This means that for varied GPGPU tasks the more flexible architecture should produce better results. The resulting chip then has lots of these little processors which will each work on one instruction at a time until all the work is completed. The Graphics Core Next GPU though is built of Compute Units (like Nvidia's Streaming Microprocessors) which are like tiny, self-contained processors. Without re-treading too much of the ground we trod with the AMD Radeon HD 7970 architectural review, the original AMD tech sorted out instructions into batches before pushing them off down the GPU pipelines.įor fixed-function graphics work, like gaming, it was a great solution.
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