GeForce GTX 660 vs Radeon R9 M370X

Intro

Compare those specifications to the Radeon R9 M370X, which comes with a GPU core clock speed of 800 MHz, and 2048 MB of GDDR5 RAM running at 1125 MHz through a 128-bit bus. It also is made up of 640 SPUs, 40 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The GeForce GTX 660 should in theory be quite a bit faster than the Radeon R9 M370X in general. (explain)

GeForce GTX 660		144192 MB/sec
Radeon R9 M370X		72000 MB/sec
	Difference: 72192 (100%)

Texel Rate

The GeForce GTX 660 will be quite a bit (about 145%) more effective at anisotropic filtering than the Radeon R9 M370X. (explain)

GeForce GTX 660		78400 Mtexels/sec
Radeon R9 M370X		32000 Mtexels/sec
	Difference: 46400 (145%)

Pixel Rate

The GeForce GTX 660 is much (more or less 84%) faster with regards to AA than the Radeon R9 M370X, and should be capable of handling higher screen resolutions while still performing well. (explain)

GeForce GTX 660		23520 Mpixels/sec
Radeon R9 M370X		12800 Mpixels/sec
	Difference: 10720 (84%)

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 max amount of information (counted in MB per second) that can be transported across the external memory interface in one second. The number is worked out by multiplying the interface width by its memory clock speed. In the case of DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher 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 are processed in one second. This is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The higher this number, the better the graphics 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 most pixels that the graphics card could possibly write to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.