Radeon HD 6750 vs Radeon HD 6950 2GB

Intro

Compare those specs to the Radeon HD 6950 2GB, which makes use of a 40 nm design. AMD has set the core speed at 800 MHz. The GDDR5 memory runs at a frequency of 1250 MHz on this card. It features 1408 SPUs as well as 88 TAUs and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6750		86 Watts
Radeon HD 6950 2GB		200 Watts
	Difference: 114 Watts (133%)

Memory Bandwidth

In theory, the Radeon HD 6950 2GB should perform a lot faster than the Radeon HD 6750 in general. (explain)

Radeon HD 6950 2GB		160000 MB/sec
Radeon HD 6750		64000 MB/sec
	Difference: 96000 (150%)

Texel Rate

The Radeon HD 6950 2GB should be much (about 170%) better at anisotropic filtering than the Radeon HD 6750. (explain)

Radeon HD 6950 2GB		70400 Mtexels/sec
Radeon HD 6750		26100 Mtexels/sec
	Difference: 44300 (170%)

Pixel Rate

The Radeon HD 6950 2GB is much (about 121%) better at full screen anti-aliasing than the Radeon HD 6750, and capable of handling higher resolutions while still performing well. (explain)

Radeon HD 6950 2GB		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: Bandwidth is the largest amount of information (counted in MB per second) that can be transported over the external memory interface within a second. It is calculated by multiplying the interface width by its memory clock speed. In the case of DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This is calculated by multiplying the total amount of texture units by the core speed of the chip. The higher the texel rate, the better the video card will be at handling 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 the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.