GeForce GTX 280 vs GeForce GTX 660 Ti

Intro

Compare all of that to the GeForce GTX 660 Ti, which features GPU core speed of 915 MHz, and 2048 MB of GDDR5 memory running at 1500 MHz through a 192-bit bus. It also is comprised of 1344 SPUs, 112 TAUs, and 24 Raster Operation Units.

Display Graphs

Hide Graphs

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

Performance-wise, the GeForce GTX 660 Ti should in theory be a bit superior to the GeForce GTX 280 overall. (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 quite a bit (about 113%) better at AF 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 is a little bit (about 14%) better at AA than the GeForce GTX 280, and will be capable of handling higher screen resolutions while still performing well. (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: Bandwidth is the maximum amount of information (measured in MB per second) that can be transferred across the external memory interface in one second. It's calculated by multiplying the card's interface width by its memory speed. In the case of DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied in one second. This number is worked out by multiplying the total number of 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 handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on 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 potential to get to the max fill rate.