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GeForce GTX 580 vs Radeon HD 6990

Intro

The GeForce GTX 580 makes use of a 40 nm design. nVidia has set the core speed at 772 MHz. The GDDR5 memory is set to run at a frequency of 1002 MHz on this specific model. It features 512 SPUs as well as 64 Texture Address Units and 48 Rasterization Operator Units.

Compare all of that to the Radeon HD 6990, which comes with clock speeds of 830 MHz on the GPU, and 1250 MHz on the 2048 MB of GDDR5 RAM. It features 1536 SPUs as well as 96 Texture Address Units 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 much faster than the GeForce GTX 580 overall. (explain)

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

Texel Rate

The Radeon HD 6990 will be a lot (approximately 223%) better at AF than the GeForce GTX 580. (explain)

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

Pixel Rate

If running with high levels of AA is important to you, then the Radeon HD 6990 is a better choice, by far. (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: Bandwidth is the maximum amount of information (in units of megabytes per second) that can be transported past the external memory interface in one second. It is worked out by multiplying the interface width by its memory speed. If the card has DDR memory, it should be multiplied by 2 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, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This number is worked out by multiplying the total texture units of the card by the core speed of the chip. The higher this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability 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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