GeForce GTX 275 vs GeForce GTX 460

Intro

Compare that to the GeForce GTX 460, which comes with GPU core speed of 675 MHz, and 768 MB of GDDR5 RAM running at 900 MHz through a 192-bit bus. It also is comprised of 336 Stream Processors, 56 TAUs, and 24 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 460		150 Watts
GeForce GTX 275		219 Watts
	Difference: 69 Watts (46%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 275 should theoretically be quite a bit better than the GeForce GTX 460 overall. (explain)

GeForce GTX 275		127008 MB/sec
GeForce GTX 460		86400 MB/sec
	Difference: 40608 (47%)

Texel Rate

The GeForce GTX 275 will be a lot (more or less 34%) better at anisotropic filtering than the GeForce GTX 460. (explain)

GeForce GTX 275		50640 Mtexels/sec
GeForce GTX 460		37800 Mtexels/sec
	Difference: 12840 (34%)

Pixel Rate

The GeForce GTX 275 is a bit (more or less 9%) faster with regards to FSAA than the GeForce GTX 460, and also will be able to handle higher resolutions without losing too much performance. (explain)

GeForce GTX 275		17724 Mpixels/sec
GeForce GTX 460		16200 Mpixels/sec
	Difference: 1524 (9%)

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 information (measured in megabytes per second) that can be moved over the external memory interface in one second. It is calculated by multiplying the bus width by its memory speed. If it uses DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, 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 amount of texture map elements (texels) that can be processed in one second. This figure is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the most pixels the graphics 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 amount of Render Output Units 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 output rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.