Radeon HD 6870
Radeon HD 6850
GTX 460 1 GB
GTX 460 768 MB
Radeon HD 5870
Radeon HD 5850
Radeon HD 5770
Radeon HD 5750
1.05 GHz (4.2GHz data rate) GDDR5
1GHz (4.0GHz data rate) GDDR5
900MHz (3.6GHz data rate) GDDR5
1.2GHz (4.8GHz data rate) GDDR5
1.15GHz (4.6GHz data rate) GDDR5
Memory Bus Width
quote: But we must gather that when comparing performance of these cards to the GF460, we are referring to the much faster 1GB version...?
quote: The 6850 is also faster than the 460 at the same price range, and uses less power, but they did put out a bit more heat than the 460, which was somewhat surprising.
quote: So while there are less shaders, each shader is more powerful on average.
quote: At the SPU level, like Cypress and every DX10 AMD design before it continues to use AMD’s VLIW5 design. 5 stream processors – the w, x, y, z, and t units – work together with a branch unit and a set of GPRs to process instructions. The 4 simple SPs can work together to process 4 FP32 MADs per clock, while the t unit can either do FP32 math like the other units or handle special functions such as a transcendental.