GeForce GTX 275 vs GeForce GTX 660 Ti

Intro

Compare all of that to the GeForce GTX 660 Ti, which has clock speeds of 915 MHz on the GPU, and 1500 MHz on the 2048 MB of GDDR5 memory. 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 275		219 Watts
	Difference: 69 Watts (46%)

Memory Bandwidth

Performance-wise, the GeForce GTX 660 Ti should theoretically be a bit superior to the GeForce GTX 275 overall. (explain)

GeForce GTX 660 Ti		144000 MB/sec
GeForce GTX 275		127008 MB/sec
	Difference: 16992 (13%)

Texel Rate

The GeForce GTX 660 Ti should be much (about 102%) better at anisotropic filtering than the GeForce GTX 275. (explain)

GeForce GTX 660 Ti		102480 Mtexels/sec
GeForce GTX 275		50640 Mtexels/sec
	Difference: 51840 (102%)

Pixel Rate

The GeForce GTX 660 Ti should be much (about 24%) faster with regards to FSAA than the GeForce GTX 275, and also should be capable of handling higher screen resolutions better. (explain)

GeForce GTX 660 Ti		21960 Mpixels/sec
GeForce GTX 275		17724 Mpixels/sec
	Difference: 4236 (24%)

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 maximum amount of information (counted in megabytes per second) that can be transferred across the external memory interface within a second. The number is calculated by multiplying the card's interface width by its memory clock speed. If it uses DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.