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GeForce GTX 580 3GB vs Radeon HD 6870

Intro

The GeForce GTX 580 3GB features core clock speeds of 772 MHz on the GPU, and 1002 MHz on the 3072 MB of GDDR5 memory. It features 512 SPUs along with 64 TAUs and 48 Rasterization Operator Units.

Compare those specs to the Radeon HD 6870, which has GPU core speed of 900 MHz, and 1024 MB of GDDR5 RAM running at 1050 MHz through a 256-bit bus. It also is made up of 1120 Stream Processors, 56 TAUs, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6870 151 Watts
GeForce GTX 580 3GB 244 Watts
Difference: 93 Watts (62%)

Memory Bandwidth

The GeForce GTX 580 3GB should in theory be quite a bit faster than the Radeon HD 6870 overall. (explain)

GeForce GTX 580 3GB 192384 MB/sec
Radeon HD 6870 134400 MB/sec
Difference: 57984 (43%)

Texel Rate

The Radeon HD 6870 is just a bit (about 2%) better at anisotropic filtering than the GeForce GTX 580 3GB. (explain)

Radeon HD 6870 50400 Mtexels/sec
GeForce GTX 580 3GB 49408 Mtexels/sec
Difference: 992 (2%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce GTX 580 3GB is a better choice, by far. (explain)

GeForce GTX 580 3GB 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 3GB

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 3GB Radeon HD 6870
Manufacturer nVidia AMD
Year November 2010 October 2010
Code Name GF110 Barts XT
Memory 3072 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 maximum amount of information (counted in MB per second) that can be transported past the external memory interface in a second. The number is worked out by multiplying the bus width by its memory clock speed. In the case of DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card can possibly record to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of Render Output Units by the the core 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 also depends on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

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GeForce GTX 580 3GB

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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