GeForce GTX 275 vs GeForce GTX 460

Intro

Compare those specifications to the GeForce GTX 460, which comes with GPU clock speed of 675 MHz, and 768 MB of GDDR5 memory running at 900 MHz through a 192-bit bus. It also features 336 Stream Processors, 56 Texture Address Units, and 24 ROPs.

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

In theory, the GeForce GTX 275 will be 47% quicker than the GeForce GTX 460 overall, due to its greater data rate. (explain)

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

Texel Rate

The GeForce GTX 275 will be quite a bit (about 34%) faster with regards to texture filtering than the GeForce GTX 460. (explain)

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

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce GTX 275 is superior to the GeForce GTX 460, though not by far. (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 maximum amount of information (in units of MB per second) that can be transported past the external memory interface within a second. The number is calculated by multiplying the bus width by the speed of its memory. In the case of DDR memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly record to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.