GeForce GTX 660 vs Radeon R7 M260X

Intro

Compare those specifications to the Radeon R7 M260X, which features a GPU core clock speed of 825 MHz, and 2048 MB of GDDR5 memory running at 1000 MHz through a 128-bit bus. It also is comprised of 384 SPUs, 24 TAUs, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the GeForce GTX 660 will be 125% faster than the Radeon R7 M260X overall, because of its higher data rate. (explain)

GeForce GTX 660		144192 MB/sec
Radeon R7 M260X		64000 MB/sec
	Difference: 80192 (125%)

Texel Rate

The GeForce GTX 660 should be a lot (approximately 296%) better at texture filtering than the Radeon R7 M260X. (explain)

GeForce GTX 660		78400 Mtexels/sec
Radeon R7 M260X		19800 Mtexels/sec
	Difference: 58600 (296%)

Pixel Rate

The GeForce GTX 660 will be much (more or less 256%) more effective at anti-aliasing than the Radeon R7 M260X, and also will be able to handle higher resolutions without slowing down too much. (explain)

GeForce GTX 660		23520 Mpixels/sec
Radeon R7 M260X		6600 Mpixels/sec
	Difference: 16920 (256%)

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 largest amount of information (in units of megabytes per second) that can be transferred across the external memory interface within a second. It is calculated by multiplying the bus width by the speed of its memory. If it uses DDR RAM, the result should be multiplied by 2 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 number of texture map elements (texels) that can be applied in one second. This number is calculated by multiplying the total amount 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 texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.