GeForce GTX 285 1GB vs GeForce GTX 460 1GB

Intro

Compare all of that to the GeForce GTX 460 1GB, which features GPU core speed of 675 MHz, and 1024 MB of GDDR5 RAM running at 900 MHz through a 256-bit bus. It also features 336 Stream Processors, 56 TAUs, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 460 1GB		160 Watts
GeForce GTX 285 1GB		204 Watts
	Difference: 44 Watts (28%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 285 1GB is 38% faster than the GeForce GTX 460 1GB in general, due to its higher bandwidth. (explain)

GeForce GTX 285 1GB		158976 MB/sec
GeForce GTX 460 1GB		115200 MB/sec
	Difference: 43776 (38%)

Texel Rate

The GeForce GTX 285 1GB is quite a bit (about 37%) better at anisotropic filtering than the GeForce GTX 460 1GB. (explain)

GeForce GTX 285 1GB		51840 Mtexels/sec
GeForce GTX 460 1GB		37800 Mtexels/sec
	Difference: 14040 (37%)

Pixel Rate

The GeForce GTX 460 1GB is a small bit (more or less 4%) better at AA than the GeForce GTX 285 1GB, and also should be able to handle higher screen resolutions without slowing down too much. (explain)

GeForce GTX 460 1GB		21600 Mpixels/sec
GeForce GTX 285 1GB		20736 Mpixels/sec
	Difference: 864 (4%)

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 (in units of MB per second) that can be moved across the external memory interface within a second. The number is worked out by multiplying the card's interface width by the speed of its memory. In the case of DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster 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 are processed per second. This is calculated by multiplying the total texture units by the core clock speed of the chip. The better this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output 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 get to the max fill rate.