Radeon HD 5670 vs Radeon HD 6950

Intro

Compare all of that to the Radeon HD 6950, which has core clock speeds of 800 MHz on the GPU, and 1250 MHz on the 1024 MB of GDDR5 memory. It features 1408 SPUs as well as 88 TAUs and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5670		61 Watts
Radeon HD 6950		200 Watts
	Difference: 139 Watts (228%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 6950 will be 150% quicker than the Radeon HD 5670 overall, because of its greater bandwidth. (explain)

Radeon HD 6950		160000 MB/sec
Radeon HD 5670		64000 MB/sec
	Difference: 96000 (150%)

Texel Rate

The Radeon HD 6950 will be quite a bit (more or less 354%) better at texture filtering than the Radeon HD 5670. (explain)

Radeon HD 6950		70400 Mtexels/sec
Radeon HD 5670		15500 Mtexels/sec
	Difference: 54900 (354%)

Pixel Rate

The Radeon HD 6950 will be much (more or less 313%) better at full screen anti-aliasing than the Radeon HD 5670, and also will be able to handle higher resolutions better. (explain)

Radeon HD 6950		25600 Mpixels/sec
Radeon HD 5670		6200 Mpixels/sec
	Difference: 19400 (313%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Price Comparison

Specifications

Memory Bandwidth: Bandwidth is the max amount of data (measured in MB per second) that can be moved over the external memory interface in one second. It's calculated by multiplying the interface width by its memory speed. In the case of DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This is calculated by multiplying the total texture units by the core speed of the chip. The higher this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.