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GeForce GTX 580 3GB vs Radeon R9 285

Intro

The GeForce GTX 580 3GB features a clock speed of 772 MHz and a GDDR5 memory frequency of 1002 MHz. It also makes use of a 384-bit memory bus, and uses a 40 nm design. It is made up of 512 SPUs, 64 Texture Address Units, and 48 ROPs.

Compare those specs to the Radeon R9 285, which uses a 28 nm design. AMD has set the core speed at 918 MHz. The GDDR5 memory works at a speed of 1375 MHz on this card. It features 1792 SPUs along with 112 Texture Address Units and 32 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 285 190 Watts
GeForce GTX 580 3GB 244 Watts
Difference: 54 Watts (28%)

Memory Bandwidth

The GeForce GTX 580 3GB should in theory perform just a bit faster than the Radeon R9 285 in general. (explain)

GeForce GTX 580 3GB 192384 MB/sec
Radeon R9 285 176000 MB/sec
Difference: 16384 (9%)

Texel Rate

The Radeon R9 285 is a lot (more or less 108%) better at texture filtering than the GeForce GTX 580 3GB. (explain)

Radeon R9 285 102816 Mtexels/sec
GeForce GTX 580 3GB 49408 Mtexels/sec
Difference: 53408 (108%)

Pixel Rate

The GeForce GTX 580 3GB should be a lot (more or less 26%) better at AA than the Radeon R9 285, and able to handle higher screen resolutions without slowing down too much. (explain)

GeForce GTX 580 3GB 37056 Mpixels/sec
Radeon R9 285 29376 Mpixels/sec
Difference: 7680 (26%)

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

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Radeon R9 285

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 R9 285
Manufacturer nVidia AMD
Year November 2010 September 2014
Code Name GF110 Tonga PRO
Memory 3072 MB 2048 MB
Core Speed 772 MHz 918 MHz
Memory Speed 4008 MHz 5500 MHz
Power (Max TDP) 244 watts 190 watts
Bandwidth 192384 MB/sec 176000 MB/sec
Texel Rate 49408 Mtexels/sec 102816 Mtexels/sec
Pixel Rate 37056 Mpixels/sec 29376 Mpixels/sec
Unified Shaders 512 1792
Texture Mapping Units 64 112
Render Output Units 48 32
Bus Type GDDR5 GDDR5
Bus Width 384-bit 256-bit
Fab Process 40 nm 28 nm
Transistors 3000 million 5000 million
Bus PCIe x16 PCIe 3.0 x16
DirectX Version DirectX 11 DirectX 12.0
OpenGL Version OpenGL 4.1 OpenGL 4.4

Memory Bandwidth: Bandwidth is the max amount of data (counted in megabytes per second) that can be transported across the external memory interface in a second. It is calculated by multiplying the bus width by its memory clock speed. If it uses DDR type memory, it should 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 texture map elements (texels) that can be processed per second. This is worked out by multiplying the total texture units of the card by the core speed of the chip. The better the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

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GeForce GTX 580 3GB

Amazon.com

Check prices at:

Radeon R9 285

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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