GeForce GTX 260 vs GeForce GTX 275

Intro

Compare those specs to the GeForce GTX 275, which features a clock speed of 633 MHz and a GDDR3 memory speed of 1134 MHz. It also makes use of a 448-bit memory bus, and uses a 55 nm design. It is comprised of 240 SPUs, 80 Texture Address Units, and 28 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 260		182 Watts
GeForce GTX 275		219 Watts
	Difference: 37 Watts (20%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 275 should in theory be a bit better than the GeForce GTX 260 overall. (explain)

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

Texel Rate

The GeForce GTX 275 will be much (more or less 37%) better at anisotropic filtering than the GeForce GTX 260. (explain)

GeForce GTX 275		50640 Mtexels/sec
GeForce GTX 260		36864 Mtexels/sec
	Difference: 13776 (37%)

Pixel Rate

If using a high resolution is important to you, then the GeForce GTX 275 is the winner, but only just. (explain)

GeForce GTX 275		17724 Mpixels/sec
GeForce GTX 260		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: Bandwidth is the largest amount of data (in units of MB per second) that can be transported past the external memory interface within a second. The number is worked out by multiplying the card's interface width by its memory speed. If it uses DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster 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 amount of texture map elements (texels) that are processed per second. This is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The better the texel rate, the better the graphics 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 that the graphics chip can possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.