Radeon HD 5970 vs Radeon HD 6750

Intro

Compare all of that to the Radeon HD 6750, which features core clock speeds of 725 MHz on the GPU, and 1000 MHz on the 512 MB of GDDR5 memory. It features 720 SPUs along with 36 TAUs and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6750		86 Watts
Radeon HD 5970		294 Watts
	Difference: 208 Watts (242%)

Memory Bandwidth

In theory, the Radeon HD 5970 should perform quite a bit faster than the Radeon HD 6750 overall. (explain)

Radeon HD 5970		256000 MB/sec
Radeon HD 6750		64000 MB/sec
	Difference: 192000 (300%)

Texel Rate

The Radeon HD 5970 should be a lot (more or less 789%) faster with regards to texture filtering than the Radeon HD 6750. (explain)

Radeon HD 5970		232000 Mtexels/sec
Radeon HD 6750		26100 Mtexels/sec
	Difference: 205900 (789%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon HD 5970 is the winner, by far. (explain)

Radeon HD 5970		92800 Mpixels/sec
Radeon HD 6750		11600 Mpixels/sec
	Difference: 81200 (700%)

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 maximum amount of information (in units of MB per second) that can be transported across the external memory interface in a second. It is calculated by multiplying the card's interface width by its memory speed. If it uses DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This number is calculated by multiplying the total texture units of the card by the core speed of the chip. The better the texel rate, the better the card will be at 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 the video card can possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated 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 rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.