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GeForce GTX 580 vs Radeon HD 6990

Intro

The GeForce GTX 580 has a GPU core clock speed of 772 MHz, and the 1536 MB of GDDR5 memory runs at 1002 MHz through a 384-bit bus. It also is made up of 512 SPUs, 64 TAUs, and 48 Raster Operation Units.

Compare those specs to the Radeon HD 6990, which comes with GPU core speed of 830 MHz, and 2048 MB of GDDR5 memory set to run at 1250 MHz through a 256-bit bus. It also is made up of 1536 Stream Processors, 96 TAUs, and 32 ROPs.

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Radeon HD 6990 5820 points
GeForce GTX 580 4956 points
Difference: 864 (17%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 580 244 Watts
Radeon HD 6990 375 Watts
Difference: 131 Watts (54%)

Memory Bandwidth

The Radeon HD 6990 should in theory be quite a bit faster than the GeForce GTX 580 in general. (explain)

Radeon HD 6990 320000 MB/sec
GeForce GTX 580 192384 MB/sec
Difference: 127616 (66%)

Texel Rate

The Radeon HD 6990 will be much (approximately 223%) more effective at texture filtering than the GeForce GTX 580. (explain)

Radeon HD 6990 159360 Mtexels/sec
GeForce GTX 580 49408 Mtexels/sec
Difference: 109952 (223%)

Pixel Rate

The Radeon HD 6990 will be much (more or less 43%) faster with regards to FSAA than the GeForce GTX 580, and also should be able to handle higher resolutions without losing too much performance. (explain)

Radeon HD 6990 53120 Mpixels/sec
GeForce GTX 580 37056 Mpixels/sec
Difference: 16064 (43%)

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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GeForce GTX 580

Amazon.com

Check prices at:

Radeon HD 6990

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 GeForce GTX 580 Radeon HD 6990
Manufacturer nVidia AMD
Year November 2010 March 2011
Code Name GF110 Antilles
Memory 1536 MB 2048 MB (x2)
Core Speed 772 MHz 830 MHz (x2)
Memory Speed 4008 MHz 5000 MHz (x2)
Power (Max TDP) 244 watts 375 watts
Bandwidth 192384 MB/sec 320000 MB/sec
Texel Rate 49408 Mtexels/sec 159360 Mtexels/sec
Pixel Rate 37056 Mpixels/sec 53120 Mpixels/sec
Unified Shaders 512 1536 (x2)
Texture Mapping Units 64 96 (x2)
Render Output Units 48 32 (x2)
Bus Type GDDR5 GDDR5
Bus Width 384-bit 256-bit (x2)
Fab Process 40 nm 40 nm
Transistors 3000 million 2640 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 (in units of MB per second) that can be moved past the external memory interface within a second. The number is worked out by multiplying the interface width by the speed of its memory. If the card has DDR type RAM, it should be multiplied by 2 once again. If 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, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per second. This figure is worked out by multiplying the total number 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 processed per second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly record to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

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GeForce GTX 580

Amazon.com

Check prices at:

Radeon HD 6990

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.

Comments

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