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GeForce GTX 580 vs Radeon HD 6870

Intro

The GeForce GTX 580 comes with a core clock speed of 772 MHz and a GDDR5 memory frequency of 1002 MHz. It also features a 384-bit bus, and uses a 40 nm design. It is comprised of 512 SPUs, 64 Texture Address Units, and 48 ROPs.

Compare those specs to the Radeon HD 6870, which comes with core clock speeds of 900 MHz on the GPU, and 1050 MHz on the 1024 MB of GDDR5 RAM. It features 1120 SPUs as well as 56 TAUs and 32 Rasterization Operator Units.

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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

GeForce GTX 580 4956 points
Radeon HD 6870 2870 points
Difference: 2086 (73%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6870 151 Watts
GeForce GTX 580 244 Watts
Difference: 93 Watts (62%)

Memory Bandwidth

Performance-wise, the GeForce GTX 580 should theoretically be a lot superior to the Radeon HD 6870 overall. (explain)

GeForce GTX 580 192384 MB/sec
Radeon HD 6870 134400 MB/sec
Difference: 57984 (43%)

Texel Rate

The Radeon HD 6870 will be a bit (more or less 2%) faster with regards to texture filtering than the GeForce GTX 580. (explain)

Radeon HD 6870 50400 Mtexels/sec
GeForce GTX 580 49408 Mtexels/sec
Difference: 992 (2%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce GTX 580 is the winner, by far. (explain)

GeForce GTX 580 37056 Mpixels/sec
Radeon HD 6870 28800 Mpixels/sec
Difference: 8256 (29%)

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.

Price Comparison

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GeForce GTX 580

Amazon.com

Check prices at:

Radeon HD 6870

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 6870
Manufacturer nVidia AMD
Year November 2010 October 2010
Code Name GF110 Barts XT
Memory 1536 MB 1024 MB
Core Speed 772 MHz 900 MHz
Memory Speed 4008 MHz 4200 MHz
Power (Max TDP) 244 watts 151 watts
Bandwidth 192384 MB/sec 134400 MB/sec
Texel Rate 49408 Mtexels/sec 50400 Mtexels/sec
Pixel Rate 37056 Mpixels/sec 28800 Mpixels/sec
Unified Shaders 512 1120
Texture Mapping Units 64 56
Render Output Units 48 32
Bus Type GDDR5 GDDR5
Bus Width 384-bit 256-bit
Fab Process 40 nm 40 nm
Transistors 3000 million 1700 million
Bus PCIe x16 PCIe x16
DirectX Version DirectX 11 DirectX 11
OpenGL Version OpenGL 4.1 OpenGL 4.1

Memory Bandwidth: Memory bandwidth is the largest amount of data (counted in MB per second) that can be transported past the external memory interface within a second. It is calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR type RAM, the result should be multiplied by 2 once again. If 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 texture map elements (texels) that are processed in one second. This number is worked out by multiplying the total texture units by the core clock speed of the chip. The better this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

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

Display Prices

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GeForce GTX 580

Amazon.com

Check prices at:

Radeon HD 6870

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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