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GeForce GTX 580 3GB vs Radeon HD 6850

Intro

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

Compare those specifications to the Radeon HD 6850, which uses a 40 nm design. AMD has set the core speed at 775 MHz. The GDDR5 RAM is set to run at a frequency of 1000 MHz on this card. It features 960 SPUs as well as 48 TAUs and 32 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6850 127 Watts
GeForce GTX 580 3GB 244 Watts
Difference: 117 Watts (92%)

Memory Bandwidth

The GeForce GTX 580 3GB, in theory, should perform much faster than the Radeon HD 6850 overall. (explain)

GeForce GTX 580 3GB 192384 MB/sec
Radeon HD 6850 128000 MB/sec
Difference: 64384 (50%)

Texel Rate

The GeForce GTX 580 3GB will be quite a bit (more or less 33%) faster with regards to anisotropic filtering than the Radeon HD 6850. (explain)

GeForce GTX 580 3GB 49408 Mtexels/sec
Radeon HD 6850 37200 Mtexels/sec
Difference: 12208 (33%)

Pixel Rate

The GeForce GTX 580 3GB will be a lot (more or less 49%) faster with regards to FSAA than the Radeon HD 6850, and also will be capable of handling higher screen resolutions without losing too much performance. (explain)

GeForce GTX 580 3GB 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 3GB

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.

Specifications

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Model GeForce GTX 580 3GB Radeon HD 6850
Manufacturer nVidia AMD
Year November 2010 October 2010
Code Name GF110 Barts Pro
Memory 3072 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 max amount of information (measured in MB per second) that can be transported past the external memory interface in one second. It's worked out by multiplying the bus width by its memory clock speed. If the card has DDR memory, it must be multiplied by 2 again. If it uses 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 amount of texture map elements (texels) that can be applied in one second. This number is calculated by multiplying the total amount 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 per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs by the the core 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 rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

Hide Prices

GeForce GTX 580 3GB

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.

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