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GeForce GTX 580 3GB vs Radeon HD 7870 XT

Intro

The GeForce GTX 580 3GB has a GPU clock speed of 772 MHz, and the 3072 MB of GDDR5 memory is set to run at 1002 MHz through a 384-bit bus. It also is made up of 512 Stream Processors, 64 TAUs, and 48 ROPs.

Compare all that to the Radeon HD 7870 XT, which features a clock frequency of 925 MHz and a GDDR5 memory speed of 1500 MHz. It also uses a 256-bit bus, and uses a 28 nm design. It features 1536 SPUs, 96 Texture Address Units, and 32 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7870 XT 185 Watts
GeForce GTX 580 3GB 244 Watts
Difference: 59 Watts (32%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 580 3GB should be a bit faster than the Radeon HD 7870 XT overall. (explain)

GeForce GTX 580 3GB 192384 MB/sec
Radeon HD 7870 XT 192000 MB/sec
Difference: 384 (0%)

Texel Rate

The Radeon HD 7870 XT is much (approximately 80%) better at texture filtering than the GeForce GTX 580 3GB. (explain)

Radeon HD 7870 XT 88800 Mtexels/sec
GeForce GTX 580 3GB 49408 Mtexels/sec
Difference: 39392 (80%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce GTX 580 3GB is a better choice, by a large margin. (explain)

GeForce GTX 580 3GB 37056 Mpixels/sec
Radeon HD 7870 XT 29600 Mpixels/sec
Difference: 7456 (25%)

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 7870 XT

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 7870 XT
Manufacturer nVidia AMD
Year November 2010 November 2012
Code Name GF110 Tahiti LE
Memory 3072 MB 2048 MB
Core Speed 772 MHz 925 MHz
Memory Speed 4008 MHz 6000 MHz
Power (Max TDP) 244 watts 185 watts
Bandwidth 192384 MB/sec 192000 MB/sec
Texel Rate 49408 Mtexels/sec 88800 Mtexels/sec
Pixel Rate 37056 Mpixels/sec 29600 Mpixels/sec
Unified Shaders 512 1536
Texture Mapping Units 64 96
Render Output Units 48 32
Bus Type GDDR5 GDDR5
Bus Width 384-bit 256-bit
Fab Process 40 nm 28 nm
Transistors 3000 million 4313 million
Bus PCIe x16 PCIe 3.0 x16
DirectX Version DirectX 11 DirectX 11.1
OpenGL Version OpenGL 4.1 OpenGL 4.3

Memory Bandwidth: Bandwidth is the largest amount of data (counted in MB per second) that can be moved past the external memory interface in a second. The number is worked out by multiplying the bus width by its memory speed. If the card has DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

Hide Prices

GeForce GTX 580 3GB

Amazon.com

Check prices at:

Radeon HD 7870 XT

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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