Radeon HD 5970 vs Radeon HD 7750

Intro

Compare all that to the Radeon HD 7750, which features core clock speeds of 800 MHz on the GPU, and 1125 MHz on the 1024 MB of GDDR5 memory. It features 512 SPUs along with 32 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7750		55 Watts
Radeon HD 5970		294 Watts
	Difference: 239 Watts (435%)

Memory Bandwidth

The Radeon HD 5970 should in theory be quite a bit faster than the Radeon HD 7750 overall. (explain)

Radeon HD 5970		256000 MB/sec
Radeon HD 7750		72000 MB/sec
	Difference: 184000 (256%)

Texel Rate

The Radeon HD 5970 will be quite a bit (approximately 806%) better at anisotropic filtering than the Radeon HD 7750. (explain)

Radeon HD 5970		232000 Mtexels/sec
Radeon HD 7750		25600 Mtexels/sec
	Difference: 206400 (806%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon HD 5970 is a better choice, by far. (explain)

Radeon HD 5970		92800 Mpixels/sec
Radeon HD 7750		12800 Mpixels/sec
	Difference: 80000 (625%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Bandwidth is the max amount of data (measured in megabytes per second) that can be transported past the external memory interface in a second. The number is worked out by multiplying the bus width by the speed of its memory. In the case of DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, 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 amount of texture map elements (texels) that can be applied per second. This figure is worked out by multiplying the total amount of texture units by the core speed of the chip. The higher the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.