GeForce GTX 275 vs GeForce GTX 660

Intro

Compare those specifications to the GeForce GTX 660, which has a core clock frequency of 980 MHz and a GDDR5 memory speed of 1502 MHz. It also uses a 192-bit bus, and makes use of a 28 nm design. It is comprised of 960 SPUs, 80 TAUs, and 24 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 660		140 Watts
GeForce GTX 275		219 Watts
	Difference: 79 Watts (56%)

Memory Bandwidth

The GeForce GTX 660 should theoretically perform just a bit faster than the GeForce GTX 275 in general. (explain)

GeForce GTX 660		144192 MB/sec
GeForce GTX 275		127008 MB/sec
	Difference: 17184 (14%)

Texel Rate

The GeForce GTX 660 will be a lot (approximately 55%) more effective at AF than the GeForce GTX 275. (explain)

GeForce GTX 660		78400 Mtexels/sec
GeForce GTX 275		50640 Mtexels/sec
	Difference: 27760 (55%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce GTX 660 is a better choice, by far. (explain)

GeForce GTX 660		23520 Mpixels/sec
GeForce GTX 275		17724 Mpixels/sec
	Difference: 5796 (33%)

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 data (in units of megabytes per second) that can be transported across the external memory interface in a second. The number is calculated by multiplying the interface width by its memory speed. If the card has DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better 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 processed in one second. This figure is worked out by multiplying the total number of texture units of the card by the core clock 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 in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly record to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour 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 is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.