Radeon HD 5750 1GB vs Radeon HD 6950

Intro

Compare that to the Radeon HD 6950, which features a core clock frequency of 800 MHz and a GDDR5 memory speed of 1250 MHz. It also makes use of a 256-bit bus, and makes use of a 40 nm design. It features 1408 SPUs, 88 TAUs, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5750 1GB		86 Watts
Radeon HD 6950		200 Watts
	Difference: 114 Watts (133%)

Memory Bandwidth

The Radeon HD 6950 should theoretically perform a lot faster than the Radeon HD 5750 1GB overall. (explain)

Radeon HD 6950		160000 MB/sec
Radeon HD 5750 1GB		73600 MB/sec
	Difference: 86400 (117%)

Texel Rate

The Radeon HD 6950 will be a lot (about 179%) better at anisotropic filtering than the Radeon HD 5750 1GB. (explain)

Radeon HD 6950		70400 Mtexels/sec
Radeon HD 5750 1GB		25200 Mtexels/sec
	Difference: 45200 (179%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon HD 6950 is a better choice, and very much so. (explain)

Radeon HD 6950		25600 Mpixels/sec
Radeon HD 5750 1GB		11200 Mpixels/sec
	Difference: 14400 (129%)

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 information (in units of megabytes per second) that can be transported past the external memory interface in a second. The number is calculated by multiplying the card's bus width by its memory speed. In the case of DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

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