Radeon HD 5750 512MB vs Radeon HD 6950 2GB

Intro

Compare those specifications to the Radeon HD 6950 2GB, which comes with GPU clock speed of 800 MHz, and 2048 MB of GDDR5 memory set to run at 1250 MHz through a 256-bit bus. It also is made up of 1408 SPUs, 88 TAUs, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5750 512MB		86 Watts
Radeon HD 6950 2GB		200 Watts
	Difference: 114 Watts (133%)

Memory Bandwidth

In theory, the Radeon HD 6950 2GB will be 117% faster than the Radeon HD 5750 512MB in general, because of its greater data rate. (explain)

Radeon HD 6950 2GB		160000 MB/sec
Radeon HD 5750 512MB		73600 MB/sec
	Difference: 86400 (117%)

Texel Rate

The Radeon HD 6950 2GB should be a lot (about 179%) faster with regards to texture filtering than the Radeon HD 5750 512MB. (explain)

Radeon HD 6950 2GB		70400 Mtexels/sec
Radeon HD 5750 512MB		25200 Mtexels/sec
	Difference: 45200 (179%)

Pixel Rate

The Radeon HD 6950 2GB will be quite a bit (more or less 129%) more effective at anti-aliasing than the Radeon HD 5750 512MB, and able to handle higher screen resolutions without losing too much performance. (explain)

Radeon HD 6950 2GB		25600 Mpixels/sec
Radeon HD 5750 512MB		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: Bandwidth is the max amount of information (counted in megabytes per second) that can be moved over the external memory interface within a second. The number is worked out by multiplying the bus width by the speed of its memory. If the card has DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, 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 amount of texture map elements (texels) that can be applied per second. This is worked out by multiplying the total number of texture units by the core speed of the chip. The better this number, the better the graphics 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 maximum amount of pixels the video card can possibly record to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.