GeForce GTX 260 216SP 55 nm vs GeForce GTX 275

Intro

Compare those specifications to the GeForce GTX 275, which has clock speeds of 633 MHz on the GPU, and 1134 MHz on the 896 MB of GDDR3 RAM. It features 240 SPUs as well as 80 Texture Address Units and 28 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 260 216SP 55 nm		171 Watts
GeForce GTX 275		219 Watts
	Difference: 48 Watts (28%)

Memory Bandwidth

Theoretically, the GeForce GTX 275 should be just a bit faster than the GeForce GTX 260 216SP 55 nm overall. (explain)

GeForce GTX 275		127008 MB/sec
GeForce GTX 260 216SP 55 nm		111888 MB/sec
	Difference: 15120 (14%)

Texel Rate

The GeForce GTX 275 is quite a bit (about 22%) better at texture filtering than the GeForce GTX 260 216SP 55 nm. (explain)

GeForce GTX 275		50640 Mtexels/sec
GeForce GTX 260 216SP 55 nm		41472 Mtexels/sec
	Difference: 9168 (22%)

Pixel Rate

The GeForce GTX 275 is a bit (about 10%) more effective at full screen anti-aliasing than the GeForce GTX 260 216SP 55 nm, and should be capable of handling higher screen resolutions more effectively. (explain)

GeForce GTX 275		17724 Mpixels/sec
GeForce GTX 260 216SP 55 nm		16128 Mpixels/sec
	Difference: 1596 (10%)

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 (counted in megabytes per second) that can be transported past the external memory interface in a second. It is calculated by multiplying the bus width by its memory clock speed. If the card has DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly write to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.