GeForce GTX 275 vs GeForce GTX 460 1GB

Intro

Compare those specifications to the GeForce GTX 460 1GB, which has GPU core speed of 675 MHz, and 1024 MB of GDDR5 memory set to run at 900 MHz through a 256-bit bus. It also is made up of 336 Stream Processors, 56 TAUs, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 460 1GB		160 Watts
GeForce GTX 275		219 Watts
	Difference: 59 Watts (37%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 275 is 10% quicker than the GeForce GTX 460 1GB in general, due to its higher data rate. (explain)

GeForce GTX 275		127008 MB/sec
GeForce GTX 460 1GB		115200 MB/sec
	Difference: 11808 (10%)

Texel Rate

The GeForce GTX 275 should be quite a bit (approximately 34%) faster with regards to texture filtering than the GeForce GTX 460 1GB. (explain)

GeForce GTX 275		50640 Mtexels/sec
GeForce GTX 460 1GB		37800 Mtexels/sec
	Difference: 12840 (34%)

Pixel Rate

The GeForce GTX 460 1GB is a lot (about 22%) better at full screen anti-aliasing than the GeForce GTX 275, and also should be able to handle higher screen resolutions more effectively. (explain)

GeForce GTX 460 1GB		21600 Mpixels/sec
GeForce GTX 275		17724 Mpixels/sec
	Difference: 3876 (22%)

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 megabytes per second) that can be transported past the external memory interface within a second. The number is worked out by multiplying the interface width by its memory clock speed. If it uses DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This number is worked out by multiplying the total texture units by the core speed of the chip. The better the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. The figure 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 outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.