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

Intro

Compare all of that to the GeForce GTX 460 (OEM), which makes use of a 40 nm design. nVidia has clocked the core frequency at 650 MHz. The GDDR5 memory runs at a frequency of 850 MHz on this specific model. It features 336 SPUs as well as 56 Texture Address Units 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

In theory, the GeForce GTX 285 2GB should be much faster than the GeForce GTX 460 (OEM) overall. (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%) more effective 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

If running with a high screen resolution is important to you, then the GeForce GTX 460 (OEM) is the winner, but it probably won't make a huge difference. (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 max amount of data (measured in megabytes per second) that can be moved across the external memory interface in one second. It's worked out by multiplying the interface width by its memory speed. In the case of DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better 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 number is calculated by multiplying the total number of texture units by the core clock speed of the chip. The higher this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.