GeForce GTX 275 vs GeForce GTX 660 Ti

Intro

Compare all of that to the GeForce GTX 660 Ti, which has GPU clock speed of 915 MHz, and 2048 MB of GDDR5 RAM running at 1500 MHz through a 192-bit bus. It also features 1344 Stream Processors, 112 TAUs, and 24 Raster Operation 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

As far as performance goes, the GeForce GTX 660 Ti should in theory be a little bit better than 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%) more effective at AF than the GeForce GTX 275. (explain)

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

Pixel Rate

If using high levels of AA is important to you, then the GeForce GTX 660 Ti is superior to the GeForce GTX 275, and very much so. (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 max amount of information (counted in megabytes per second) that can be transported past the external memory interface within a second. The number is calculated by multiplying the interface width by the speed of its memory. In the case of DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This number is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The better the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a 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. The number is calculated by multiplying the number of Raster Operations Pipelines 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, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.