Radeon HD 5970 vs Radeon HD 7750

Intro

Compare that to the Radeon HD 7750, which has clock speeds of 800 MHz on the GPU, and 1125 MHz on the 1024 MB of GDDR5 RAM. It features 512 SPUs as well as 32 Texture Address Units 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

Theoretically speaking, the Radeon HD 5970 should be a lot faster than the Radeon HD 7750 in general. (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 (more or less 806%) faster with regards to 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

The Radeon HD 5970 will be quite a bit (approximately 625%) more effective at AA than the Radeon HD 7750, and also able to handle higher screen resolutions better. (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: Memory bandwidth is the largest amount of data (counted in megabytes per second) that can be moved across the external memory interface in a second. It's worked out by multiplying the card's bus width by its memory clock speed. If the card has DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better 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 number of texture map elements (texels) that can be processed per second. This is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The higher the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.