GeForce GTX 285 2GB vs GeForce GTX 460 (OEM)

Intro

Compare all that to the GeForce GTX 460 (OEM), which makes use of a 40 nm design. nVidia has set the core speed at 650 MHz. The GDDR5 RAM works at a frequency of 850 MHz on this card. It features 336 SPUs along with 56 TAUs and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 460 (OEM)		150 Watts
GeForce GTX 285 2GB		204 Watts
	Difference: 54 Watts (36%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 285 2GB is 46% faster than the GeForce GTX 460 (OEM) overall, due to its higher data rate. (explain)

GeForce GTX 285 2GB		158976 MB/sec
GeForce GTX 460 (OEM)		108800 MB/sec
	Difference: 50176 (46%)

Texel Rate

The GeForce GTX 285 2GB is much (more or less 42%) better at texture filtering than the GeForce GTX 460 (OEM). (explain)

GeForce GTX 285 2GB		51840 Mtexels/sec
GeForce GTX 460 (OEM)		36400 Mtexels/sec
	Difference: 15440 (42%)

Pixel Rate

The GeForce GTX 460 (OEM) is a bit (approximately 0%) better at AA than the GeForce GTX 285 2GB, and will be able to handle higher screen resolutions while still performing well. (explain)

GeForce GTX 460 (OEM)		20800 Mpixels/sec
GeForce GTX 285 2GB		20736 Mpixels/sec
	Difference: 64 (0%)

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 (in units of megabytes per second) that can be transferred past the external memory interface within a second. The number is worked out by multiplying the interface width by its memory clock speed. If the card has DDR type RAM, it 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 AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This is worked out by multiplying the total texture units by the core 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 processed in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.