GeForce GTX 285 2GB vs GeForce GTX 570

Intro

Compare those specifications to the GeForce GTX 570, which features a GPU core clock speed of 732 MHz, and 1280 MB of GDDR5 RAM running at 950 MHz through a 320-bit bus. It also is made up of 480 Stream Processors, 60 TAUs, and 40 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 285 2GB		204 Watts
GeForce GTX 570		219 Watts
	Difference: 15 Watts (7%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 285 2GB should in theory be a bit better than the GeForce GTX 570 in general. (explain)

GeForce GTX 285 2GB		158976 MB/sec
GeForce GTX 570		152000 MB/sec
	Difference: 6976 (5%)

Texel Rate

The GeForce GTX 285 2GB should be a bit (approximately 18%) more effective at anisotropic filtering than the GeForce GTX 570. (explain)

GeForce GTX 285 2GB		51840 Mtexels/sec
GeForce GTX 570		43920 Mtexels/sec
	Difference: 7920 (18%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce GTX 570 is a better choice, and very much so. (explain)

GeForce GTX 570		29280 Mpixels/sec
GeForce GTX 285 2GB		20736 Mpixels/sec
	Difference: 8544 (41%)

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: Memory bandwidth is the max amount of information (counted in MB per second) that can be transported over the external memory interface in a second. It's calculated by multiplying the card's interface width by its memory clock speed. In the case of DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

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