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GeForce GTX 285 1GB vs GeForce GTX 580

Intro

The GeForce GTX 285 1GB makes use of a 55 nm design. nVidia has clocked the core speed at 648 MHz. The GDDR3 RAM runs at a frequency of 1242 MHz on this particular model. It features 240 SPUs as well as 80 TAUs and 32 Rasterization Operator Units.

Compare that to the GeForce GTX 580, which has a core clock speed of 772 MHz and a GDDR5 memory speed of 1002 MHz. It also makes use of a 384-bit memory bus, and uses a 40 nm design. It features 512 SPUs, 64 TAUs, and 48 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 285 1GB 204 Watts
GeForce GTX 580 244 Watts
Difference: 40 Watts (20%)

Memory Bandwidth

Theoretically, the GeForce GTX 580 should be a lot faster than the GeForce GTX 285 1GB in general. (explain)

GeForce GTX 580 192384 MB/sec
GeForce GTX 285 1GB 158976 MB/sec
Difference: 33408 (21%)

Texel Rate

The GeForce GTX 285 1GB should be just a bit (more or less 5%) more effective at texture filtering than the GeForce GTX 580. (explain)

GeForce GTX 285 1GB 51840 Mtexels/sec
GeForce GTX 580 49408 Mtexels/sec
Difference: 2432 (5%)

Pixel Rate

The GeForce GTX 580 is a lot (about 79%) better at FSAA than the GeForce GTX 285 1GB, and also should be capable of handling higher resolutions more effectively. (explain)

GeForce GTX 580 37056 Mpixels/sec
GeForce GTX 285 1GB 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 1GB

Amazon.com

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GeForce GTX 580

Amazon.com

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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 1GB GeForce GTX 580
Manufacturer nVidia nVidia
Year January 15, 2009 November 2010
Code Name G200b GF110
Memory 1024 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 data (in units of MB per second) that can be moved over the external memory interface within a second. It's calculated by multiplying the bus width by its memory clock speed. In the case of DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

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GeForce GTX 285 1GB

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.

Comments

One Response to “GeForce GTX 285 1GB vs GeForce GTX 580”
Consiglio acquisti 580-590 o 6970-6990!!! parliamone!! - Forum di Tom's Hardware says:

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