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GeForce GTX 580 vs Radeon HD 6850

Intro

The GeForce GTX 580 uses a 40 nm design. nVidia has clocked the core frequency at 772 MHz. The GDDR5 memory is set to run at a speed 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 6850, which features core clock speeds of 775 MHz on the GPU, and 1000 MHz on the 1024 MB of GDDR5 memory. It features 960 SPUs along with 48 Texture Address Units 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 6850 2395 points
Difference: 2561 (107%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6850 127 Watts
GeForce GTX 580 244 Watts
Difference: 117 Watts (92%)

Memory Bandwidth

Theoretically, the GeForce GTX 580 should perform much faster than the Radeon HD 6850 overall. (explain)

GeForce GTX 580 192384 MB/sec
Radeon HD 6850 128000 MB/sec
Difference: 64384 (50%)

Texel Rate

The GeForce GTX 580 should be much (more or less 33%) more effective at anisotropic filtering than the Radeon HD 6850. (explain)

GeForce GTX 580 49408 Mtexels/sec
Radeon HD 6850 37200 Mtexels/sec
Difference: 12208 (33%)

Pixel Rate

The GeForce GTX 580 will be a lot (about 49%) faster with regards to anti-aliasing than the Radeon HD 6850, and will be able to handle higher screen resolutions better. (explain)

GeForce GTX 580 37056 Mpixels/sec
Radeon HD 6850 24800 Mpixels/sec
Difference: 12256 (49%)

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

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Radeon HD 6850

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 6850
Manufacturer nVidia AMD
Year November 2010 October 2010
Code Name GF110 Barts Pro
Memory 1536 MB 1024 MB
Core Speed 772 MHz 775 MHz
Memory Speed 4008 MHz 4000 MHz
Power (Max TDP) 244 watts 127 watts
Bandwidth 192384 MB/sec 128000 MB/sec
Texel Rate 49408 Mtexels/sec 37200 Mtexels/sec
Pixel Rate 37056 Mpixels/sec 24800 Mpixels/sec
Unified Shaders 512 960
Texture Mapping Units 64 48
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 information (counted in megabytes per second) that can be transferred across the external memory interface within a second. It is worked out by multiplying the card's bus width by its memory 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 bandwidth is, the better 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 number of texture map elements (texels) that are processed per second. This figure is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the graphics card will be at 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 the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called 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 of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

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GeForce GTX 580

Amazon.com

Check prices at:

Radeon HD 6850

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

2 Responses to “GeForce GTX 580 vs Radeon HD 6850”
Unknown says:

So Crossfiring 6850s will beat a gtx 580 for $200 less (assuming doubling performance on a 4ghz sandy brigde processor)...

L.A Noire - Thread Oficial. says:

[...] Re: L.A Noire - Thread Oficial. Jajajajaja o esta muy bien optimizado para ATI, por que una 6850 no le hace ni el peso a una 580 GTX. 580GTX vs ATI6850 [...]

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