Radeon HD 6750 1GB vs Radeon HD 6950

Intro

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

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6750 1GB		86 Watts
Radeon HD 6950		200 Watts
	Difference: 114 Watts (133%)

Memory Bandwidth

The Radeon HD 6950, in theory, should be much faster than the Radeon HD 6750 1GB overall. (explain)

Radeon HD 6950		160000 MB/sec
Radeon HD 6750 1GB		64000 MB/sec
	Difference: 96000 (150%)

Texel Rate

The Radeon HD 6950 should be quite a bit (about 170%) faster with regards to anisotropic filtering than the Radeon HD 6750 1GB. (explain)

Radeon HD 6950		70400 Mtexels/sec
Radeon HD 6750 1GB		26100 Mtexels/sec
	Difference: 44300 (170%)

Pixel Rate

The Radeon HD 6950 is quite a bit (more or less 121%) better at anti-aliasing than the Radeon HD 6750 1GB, and also should be capable of handling higher resolutions better. (explain)

Radeon HD 6950		25600 Mpixels/sec
Radeon HD 6750 1GB		11600 Mpixels/sec
	Difference: 14000 (121%)

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: Memory bandwidth is the maximum amount of information (in units of megabytes per second) that can be moved past the external memory interface in one second. It is worked out by multiplying the interface width by the speed of its memory. If the card has DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.