Radeon HD 5750 512MB vs Radeon HD 7970

Intro

Compare those specifications to the Radeon HD 7970, which has a core clock speed of 925 MHz and a GDDR5 memory speed of 1375 MHz. It also features a 384-bit bus, and uses a 28 nm design. It is made up of 2048 SPUs, 128 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 7970		250 Watts
	Difference: 164 Watts (191%)

Memory Bandwidth

The Radeon HD 7970 should in theory perform quite a bit faster than the Radeon HD 5750 512MB in general. (explain)

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

Texel Rate

The Radeon HD 7970 is quite a bit (approximately 370%) more effective 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

If using high levels of AA is important to you, then the Radeon HD 7970 is superior to the Radeon HD 5750 512MB, by a large margin. (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: Bandwidth is the largest amount of data (counted in megabytes per second) that can be transported across the external memory interface in a second. It is worked out by multiplying the bus width by its memory speed. If the card has DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. 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 texture map elements (texels) that are processed in one second. This number is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher the texel rate, 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 that the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.