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GeForce GTX 285 2GB vs GeForce GTX 470

Intro

The GeForce GTX 285 2GB has clock speeds of 648 MHz on the GPU, and 1242 MHz on the 2048 MB of GDDR3 RAM. It features 240 SPUs as well as 80 Texture Address Units and 32 Rasterization Operator Units.

Compare all of that to the GeForce GTX 470, which features a clock frequency of 607 MHz and a GDDR5 memory speed of 837 MHz. It also features a 320-bit memory bus, and makes use of a 40 nm design. It is made up of 448 SPUs, 56 Texture Address Units, and 40 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 285 2GB 204 Watts
GeForce GTX 470 215 Watts
Difference: 11 Watts (5%)

Memory Bandwidth

In theory, the GeForce GTX 285 2GB should be 19% faster than the GeForce GTX 470 overall, because of its higher data rate. (explain)

GeForce GTX 285 2GB 158976 MB/sec
GeForce GTX 470 133920 MB/sec
Difference: 25056 (19%)

Texel Rate

The GeForce GTX 285 2GB will be much (more or less 53%) more effective at texture filtering than the GeForce GTX 470. (explain)

GeForce GTX 285 2GB 51840 Mtexels/sec
GeForce GTX 470 33992 Mtexels/sec
Difference: 17848 (53%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce GTX 470 is superior to the GeForce GTX 285 2GB, though not by far. (explain)

GeForce GTX 470 24280 Mpixels/sec
GeForce GTX 285 2GB 20736 Mpixels/sec
Difference: 3544 (17%)

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 470

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 470
Manufacturer nVidia nVidia
Year January 15, 2009 March 2010
Code Name G200b GF100
Memory 2048 MB 1280 MB
Core Speed 648 MHz 607 MHz
Memory Speed 2484 MHz 3348 MHz
Power (Max TDP) 204 watts 215 watts
Bandwidth 158976 MB/sec 133920 MB/sec
Texel Rate 51840 Mtexels/sec 33992 Mtexels/sec
Pixel Rate 20736 Mpixels/sec 24280 Mpixels/sec
Unified Shaders 240 448
Texture Mapping Units 80 56
Render Output Units 32 40
Bus Type GDDR3 GDDR5
Bus Width 512-bit 320-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 maximum amount of information (counted in megabytes per second) that can be transferred across the external memory interface within a second. It is calculated by multiplying the bus width by its memory speed. If it uses DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, 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 calculated by multiplying the total amount of texture units by the core clock speed of the chip. The better this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

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GeForce GTX 285 2GB

Amazon.com

Check prices at:

GeForce GTX 470

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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