Radeon HD 5750 512MB vs Radeon HD 6850

Intro

Compare those specs to the Radeon HD 6850, which comes with clock speeds of 775 MHz on the GPU, and 1000 MHz on the 1024 MB of GDDR5 memory. It features 960 SPUs as well as 48 Texture Address Units and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5750 512MB		86 Watts
Radeon HD 6850		127 Watts
	Difference: 41 Watts (48%)

Memory Bandwidth

Performance-wise, the Radeon HD 6850 should in theory be a lot better than the Radeon HD 5750 512MB in general. (explain)

Radeon HD 6850		128000 MB/sec
Radeon HD 5750 512MB		73600 MB/sec
	Difference: 54400 (74%)

Texel Rate

The Radeon HD 6850 will be a lot (approximately 48%) better at texture filtering than the Radeon HD 5750 512MB. (explain)

Radeon HD 6850		37200 Mtexels/sec
Radeon HD 5750 512MB		25200 Mtexels/sec
	Difference: 12000 (48%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon HD 6850 is the winner, and very much so. (explain)

Radeon HD 6850		24800 Mpixels/sec
Radeon HD 5750 512MB		11200 Mpixels/sec
	Difference: 13600 (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 maximum amount of information (counted in MB per second) that can be transported over the external memory interface in one second. The number is worked out by multiplying the card's interface width by the speed of its memory. If it uses DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly record to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes 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, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.