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GeForce GTX 285 2GB vs GeForce GTX 580

Intro

The GeForce GTX 285 2GB comes with core speeds of 648 MHz on the GPU, and 1242 MHz on the 2048 MB of GDDR3 memory. It features 240 SPUs as well as 80 Texture Address Units and 32 ROPs.

Compare that to the GeForce GTX 580, which makes use of a 40 nm design. nVidia has set the core speed at 772 MHz. The GDDR5 RAM is set to run at a frequency of 1002 MHz on this specific model. It features 512 SPUs as well as 64 Texture Address Units and 48 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 285 2GB 204 Watts
GeForce GTX 580 244 Watts
Difference: 40 Watts (20%)

Memory Bandwidth

The GeForce GTX 580, in theory, should be a lot faster than the GeForce GTX 285 2GB overall. (explain)

GeForce GTX 580 192384 MB/sec
GeForce GTX 285 2GB 158976 MB/sec
Difference: 33408 (21%)

Texel Rate

The GeForce GTX 285 2GB will be just a bit (more or less 5%) better at texture filtering than the GeForce GTX 580. (explain)

GeForce GTX 285 2GB 51840 Mtexels/sec
GeForce GTX 580 49408 Mtexels/sec
Difference: 2432 (5%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce GTX 580 is the winner, by far. (explain)

GeForce GTX 580 37056 Mpixels/sec
GeForce GTX 285 2GB 20736 Mpixels/sec
Difference: 16320 (79%)

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 285 2GB

Amazon.com

Check prices at:

GeForce GTX 580

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 285 2GB GeForce GTX 580
Manufacturer nVidia nVidia
Year January 15, 2009 November 2010
Code Name G200b GF110
Memory 2048 MB 1536 MB
Core Speed 648 MHz 772 MHz
Memory Speed 2484 MHz 4008 MHz
Power (Max TDP) 204 watts 244 watts
Bandwidth 158976 MB/sec 192384 MB/sec
Texel Rate 51840 Mtexels/sec 49408 Mtexels/sec
Pixel Rate 20736 Mpixels/sec 37056 Mpixels/sec
Unified Shaders 240 512
Texture Mapping Units 80 64
Render Output Units 32 48
Bus Type GDDR3 GDDR5
Bus Width 512-bit 384-bit
Fab Process 55 nm 40 nm
Transistors 1400 million 3000 million
Bus PCIe x16 2.0 PCIe x16
DirectX Version DirectX 10 DirectX 11
OpenGL Version OpenGL 3.1 OpenGL 4.1

Memory Bandwidth: Bandwidth is the max amount of information (measured in megabytes per second) that can be transferred past the external memory interface in one second. It is calculated by multiplying the bus width by its memory speed. If it uses DDR memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one second. This figure is worked out by multiplying the total number of texture units by the core speed of the chip. The higher this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly record to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units 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 fill rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

Hide Prices

GeForce GTX 285 2GB

Amazon.com

Check prices at:

GeForce GTX 580

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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