GeForce GTX 285 2GB vs GeForce GTX 660

Intro

Compare that to the GeForce GTX 660, which uses a 28 nm design. nVidia has set the core speed at 980 MHz. The GDDR5 RAM works at a frequency of 1502 MHz on this particular model. It features 960 SPUs as well as 80 TAUs and 24 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 660		140 Watts
GeForce GTX 285 2GB		204 Watts
	Difference: 64 Watts (46%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 285 2GB should theoretically be just a bit superior to the GeForce GTX 660 overall. (explain)

GeForce GTX 285 2GB		158976 MB/sec
GeForce GTX 660		144192 MB/sec
	Difference: 14784 (10%)

Texel Rate

The GeForce GTX 660 will be quite a bit (approximately 51%) better at texture filtering than the GeForce GTX 285 2GB. (explain)

GeForce GTX 660		78400 Mtexels/sec
GeForce GTX 285 2GB		51840 Mtexels/sec
	Difference: 26560 (51%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce GTX 660 is the winner, but not by far. (explain)

GeForce GTX 660		23520 Mpixels/sec
GeForce GTX 285 2GB		20736 Mpixels/sec
	Difference: 2784 (13%)

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 maximum amount of data (measured in megabytes per second) that can be moved across the external memory interface in a second. It's worked out by multiplying the card's interface width by the speed of its memory. If the card has DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better 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 are processed per second. This is worked out 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 card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the the core 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 many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.