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Radeon HD 5970 vs Radeon HD 6790

Intro

The Radeon HD 5970 uses a 40 nm design. AMD has clocked the core frequency at 725 MHz. The GDDR5 memory works at a speed of 1000 MHz on this particular card. It features 1600 SPUs along with 160 TAUs and 64 Rasterization Operator Units.

Compare all of that to the Radeon HD 6790, which comes with a clock speed of 840 MHz and a GDDR5 memory speed of 1050 MHz. It also features a 256-bit bus, and uses a 40 nm design. It is made up of 800 SPUs, 40 TAUs, and 16 ROPs.

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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

As far as performance goes, the Radeon HD 5970 should theoretically be a lot superior to the Radeon HD 6790 in general. (explain)

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

Texel Rate

The Radeon HD 5970 is much (approximately 590%) more effective at texture filtering than the Radeon HD 6790. (explain)

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

Pixel Rate

The Radeon HD 5970 should be much (more or less 590%) faster with regards to AA than the Radeon HD 6790, and capable of handling higher screen resolutions while still performing well. (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: Bandwidth is the max amount of information (in units of MB per second) that can be transported over the external memory interface within a second. It's worked out by multiplying the bus width by its memory clock speed. If the card has DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of Raster Operations Pipelines by the the core clock speed. 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 lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max 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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