GeForce GTX 280 vs GeForce GTX 660 Ti

Intro

Compare those specs 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 memory. It features 1344 SPUs as well as 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 280		236 Watts
	Difference: 86 Watts (57%)

Memory Bandwidth

In theory, the GeForce GTX 660 Ti should perform a little bit faster than the GeForce GTX 280 in general. (explain)

GeForce GTX 660 Ti		144000 MB/sec
GeForce GTX 280		141696 MB/sec
	Difference: 2304 (2%)

Texel Rate

The GeForce GTX 660 Ti should be much (more or less 113%) more effective at texture filtering than the GeForce GTX 280. (explain)

GeForce GTX 660 Ti		102480 Mtexels/sec
GeForce GTX 280		48160 Mtexels/sec
	Difference: 54320 (113%)

Pixel Rate

The GeForce GTX 660 Ti will be a little bit (more or less 14%) more effective at full screen anti-aliasing than the GeForce GTX 280, and also will be capable of handling higher screen resolutions more effectively. (explain)

GeForce GTX 660 Ti		21960 Mpixels/sec
GeForce GTX 280		19264 Mpixels/sec
	Difference: 2696 (14%)

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 largest amount of information (measured in megabytes per second) that can be transferred across the external memory interface within a second. It's calculated by multiplying the bus width by its memory speed. In the case of DDR memory, the result should be multiplied by 2 once again. If it uses 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, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly write to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as 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 - the lower the bandwidth is, the lower the potential to get to the max fill rate.