GeForce GTX 285 2GB vs GeForce GTX 470

Intro

Compare all that to the GeForce GTX 470, which has a GPU core clock speed of 607 MHz, and 1280 MB of GDDR5 RAM running at 837 MHz through a 320-bit bus. It also is made up of 448 SPUs, 56 TAUs, and 40 ROPs.

Display Graphs

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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

The GeForce GTX 285 2GB should theoretically be a small bit faster than the GeForce GTX 470 overall. (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 a lot (more or less 53%) better at AF 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 a high resolution is important to you, then the GeForce GTX 470 is the winner, though only just barely. (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

Specifications

Memory Bandwidth: Bandwidth is the maximum amount of information (measured in megabytes per second) that can be moved over the external memory interface in one second. It is calculated by multiplying the card's bus width by its memory clock speed. If it uses DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, 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 amount of texture map elements (texels) that can be applied per second. This is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The better the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly record to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.