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GeForce GTX 580 vs Radeon HD 7870


Intro

The GeForce GTX 580 features a GPU core clock speed of 772 MHz, and the 1536 MB of GDDR5 RAM runs at 1002 MHz through a 384-bit bus. It also is comprised of 512 SPUs, 64 Texture Address Units, and 48 Raster Operation Units.

Compare all that to the Radeon HD 7870, which comes with GPU core speed of 1000 MHz, and 2048 MB of GDDR5 memory running at 1200 MHz through a 256-bit bus. It also is comprised of 1280 SPUs, 80 Texture Address Units, and 32 Raster Operation 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

Radeon HD 7870 6230 points
GeForce GTX 580 4960 points
Difference: 1270 (26%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7870 175 Watts
GeForce GTX 580 244 Watts
Difference: 69 Watts (39%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 580 is 25% quicker than the Radeon HD 7870 in general, due to its higher bandwidth. (explain)

GeForce GTX 580 192384 MB/sec
Radeon HD 7870 153600 MB/sec
Difference: 38784 (25%)

Texel Rate

The Radeon HD 7870 is a lot (about 62%) more effective at AF than the GeForce GTX 580. (explain)

Radeon HD 7870 80000 Mtexels/sec
GeForce GTX 580 49408 Mtexels/sec
Difference: 30592 (62%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce GTX 580 is the winner, but only just. (explain)

GeForce GTX 580 37056 Mpixels/sec
Radeon HD 7870 32000 Mpixels/sec
Difference: 5056 (16%)

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

Radeon HD 7870

Amazon.com

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 7870
Manufacturer nVidia AMD
Year November 2010 March 2012
Code Name GF110 Pitcairn XT
Memory 1536 MB 2048 MB
Core Speed 772 MHz 1000 MHz
Memory Speed 4008 MHz 4800 MHz
Power (Max TDP) 244 watts 175 watts
Bandwidth 192384 MB/sec 153600 MB/sec
Texel Rate 49408 Mtexels/sec 80000 Mtexels/sec
Pixel Rate 37056 Mpixels/sec 32000 Mpixels/sec
Unified Shaders 512 1280
Texture Mapping Units 64 80
Render Output Units 48 32
Bus Type GDDR5 GDDR5
Bus Width 384-bit 256-bit
Fab Process 40 nm 28 nm
Transistors 3000 million 2800 million
Bus PCIe x16 PCIe 3.0 x16
DirectX Version DirectX 11 DirectX 11.1
OpenGL Version OpenGL 4.1 OpenGL 4.2

Memory Bandwidth: Bandwidth is the largest amount of information (in units of megabytes per second) that can be transferred over the external memory interface in a second. The number is calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one 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 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 maximum amount of pixels the video card could possibly write to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

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GeForce GTX 580

Amazon.com

Radeon HD 7870

Amazon.com

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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