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Radeon HD 5970 vs Radeon HD 6790

Intro

The Radeon HD 5970 comes with a GPU core clock speed of 725 MHz, and the 1024 MB of GDDR5 RAM is set to run at 1000 MHz through a 256-bit bus. It also is comprised of 1600 Stream Processors, 160 TAUs, and 64 ROPs.

Compare all that to the Radeon HD 6790, which uses a 40 nm design. AMD has clocked the core frequency at 840 MHz. The GDDR5 memory works at a speed of 1050 MHz on this specific card. It features 800 SPUs as well as 40 TAUs and 16 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6790 150 Watts
Radeon HD 5970 294 Watts
Difference: 144 Watts (96%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 5970 will be 90% faster than the Radeon HD 6790 in general, because of its higher data rate. (explain)

Radeon HD 5970 256000 MB/sec
Radeon HD 6790 134400 MB/sec
Difference: 121600 (90%)

Texel Rate

The Radeon HD 5970 is much (more or less 590%) faster with regards to AF than the Radeon HD 6790. (explain)

Radeon HD 5970 232000 Mtexels/sec
Radeon HD 6790 33600 Mtexels/sec
Difference: 198400 (590%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon HD 5970 is superior to the Radeon HD 6790, by a large margin. (explain)

Radeon HD 5970 92800 Mpixels/sec
Radeon HD 6790 13440 Mpixels/sec
Difference: 79360 (590%)

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

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Radeon HD 5970

Amazon.com

Check prices at:

Radeon HD 6790

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

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Model Radeon HD 5970 Radeon HD 6790
Manufacturer AMD AMD
Year November 2009 April 2011
Code Name Hemlock XT Barts LE
Memory 1024 MB (x2) 1024 MB
Core Speed 725 MHz (x2) 840 MHz
Memory Speed 4000 MHz (x2) 4200 MHz
Power (Max TDP) 294 watts 150 watts
Bandwidth 256000 MB/sec 134400 MB/sec
Texel Rate 232000 Mtexels/sec 33600 Mtexels/sec
Pixel Rate 92800 Mpixels/sec 13440 Mpixels/sec
Unified Shaders 1600 (x2) 800
Texture Mapping Units 160 (x2) 40
Render Output Units 64 (x2) 16
Bus Type GDDR5 GDDR5
Bus Width 256-bit (x2) 256-bit
Fab Process 40 nm 40 nm
Transistors 2154 million 1700 million
Bus PCIe x16 PCIe 2.1 x16
DirectX Version DirectX 11 DirectX 11
OpenGL Version OpenGL 4.1 OpenGL 4.1

Memory Bandwidth: Memory bandwidth is the max amount of information (counted in megabytes per second) that can be transported over the external memory interface in a second. It is worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly write to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour ROPs by the the core clock speed. 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 quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

Hide Prices

Radeon HD 5970

Amazon.com

Check prices at:

Radeon HD 6790

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

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