Radeon HD 5750 512MB vs Radeon HD 7970

Intro

Compare those specs to the Radeon HD 7970, which has clock speeds of 925 MHz on the GPU, and 1375 MHz on the 3072 MB of GDDR5 RAM. It features 2048 SPUs along with 128 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 7970		250 Watts
	Difference: 164 Watts (191%)

Memory Bandwidth

In theory, the Radeon HD 7970 should be much faster than the Radeon HD 5750 512MB overall. (explain)

Radeon HD 7970		264000 MB/sec
Radeon HD 5750 512MB		73600 MB/sec
	Difference: 190400 (259%)

Texel Rate

The Radeon HD 7970 will be quite a bit (about 370%) better at texture filtering than the Radeon HD 5750 512MB. (explain)

Radeon HD 7970		118400 Mtexels/sec
Radeon HD 5750 512MB		25200 Mtexels/sec
	Difference: 93200 (370%)

Pixel Rate

The Radeon HD 7970 should be a lot (about 164%) better at FSAA than the Radeon HD 5750 512MB, and able to handle higher screen resolutions more effectively. (explain)

Radeon HD 7970		29600 Mpixels/sec
Radeon HD 5750 512MB		11200 Mpixels/sec
	Difference: 18400 (164%)

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 moved past the external memory interface in a second. It is calculated by multiplying the card's bus width by its memory clock speed. If it uses DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This figure is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better 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 number of pixels the video card could possibly record to the 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 the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.