GeForce GTX 285 1GB vs GeForce GTX 570

Intro

Compare that to the GeForce GTX 570, which has a clock speed of 732 MHz and a GDDR5 memory frequency of 950 MHz. It also features a 320-bit memory bus, and makes use of a 40 nm design. It features 480 SPUs, 60 Texture Address Units, and 40 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 285 1GB		204 Watts
GeForce GTX 570		219 Watts
	Difference: 15 Watts (7%)

Memory Bandwidth

The GeForce GTX 285 1GB should in theory perform a little bit faster than the GeForce GTX 570 overall. (explain)

GeForce GTX 285 1GB		158976 MB/sec
GeForce GTX 570		152000 MB/sec
	Difference: 6976 (5%)

Texel Rate

The GeForce GTX 285 1GB will be a small bit (more or less 18%) faster with regards to texture filtering than the GeForce GTX 570. (explain)

GeForce GTX 285 1GB		51840 Mtexels/sec
GeForce GTX 570		43920 Mtexels/sec
	Difference: 7920 (18%)

Pixel Rate

The GeForce GTX 570 should be quite a bit (more or less 41%) better at FSAA than the GeForce GTX 285 1GB, and also capable of handling higher resolutions more effectively. (explain)

GeForce GTX 570		29280 Mpixels/sec
GeForce GTX 285 1GB		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 largest amount of data (counted in MB per second) that can be moved over the external memory interface in a second. The number is calculated by multiplying the bus width by its memory clock speed. In the case of DDR memory, the result should be multiplied by 2 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 anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card can possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.