GeForce GTX 260 216SP 55 nm vs GeForce GTX 660 Ti

Intro

Compare those specifications to the GeForce GTX 660 Ti, which features core speeds of 915 MHz on the GPU, and 1500 MHz on the 2048 MB of GDDR5 RAM. It features 1344 SPUs along with 112 TAUs and 24 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 660 Ti		150 Watts
GeForce GTX 260 216SP 55 nm		171 Watts
	Difference: 21 Watts (14%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 660 Ti will be 29% faster than the GeForce GTX 260 216SP 55 nm in general, due to its greater bandwidth. (explain)

GeForce GTX 660 Ti		144000 MB/sec
GeForce GTX 260 216SP 55 nm		111888 MB/sec
	Difference: 32112 (29%)

Texel Rate

The GeForce GTX 660 Ti is quite a bit (more or less 147%) better at texture filtering than the GeForce GTX 260 216SP 55 nm. (explain)

GeForce GTX 660 Ti		102480 Mtexels/sec
GeForce GTX 260 216SP 55 nm		41472 Mtexels/sec
	Difference: 61008 (147%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce GTX 660 Ti is superior to the GeForce GTX 260 216SP 55 nm, by a large margin. (explain)

GeForce GTX 660 Ti		21960 Mpixels/sec
GeForce GTX 260 216SP 55 nm		16128 Mpixels/sec
	Difference: 5832 (36%)

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 information (in units of MB per second) that can be transported past the external memory interface within a second. It is worked out by multiplying the card's interface width by the speed of its memory. In the case of DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This figure is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The higher this number, the better the 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 card could 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 ROPs 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 rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.