Radeon HD 6750 vs Radeon HD 6950

Intro

Compare all of that to the Radeon HD 6950, which makes use of a 40 nm design. AMD has set the core frequency at 800 MHz. The GDDR5 memory is set to run at a frequency of 1250 MHz on this specific model. 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 6750		86 Watts
Radeon HD 6950		200 Watts
	Difference: 114 Watts (133%)

Memory Bandwidth

The Radeon HD 6950 should theoretically be a lot faster than the Radeon HD 6750 in general. (explain)

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

Texel Rate

The Radeon HD 6950 is a lot (about 170%) faster with regards to texture filtering than the Radeon HD 6750. (explain)

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

Pixel Rate

The Radeon HD 6950 is a lot (about 121%) more effective at AA than the Radeon HD 6750, and will be able to handle higher screen resolutions better. (explain)

Radeon HD 6950		25600 Mpixels/sec
Radeon HD 6750		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 max amount of data (measured in MB per second) that can be transferred past the external memory interface in a second. The number is calculated by multiplying the card's interface width by its memory speed. In the case of DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.