GeForce GTX 660 vs Radeon R9 M375X

Intro

Compare those specifications to the Radeon R9 M375X, which comes with a core clock frequency of 1015 MHz and a GDDR5 memory frequency of 1125 MHz. It also uses a 128-bit bus, and makes use of a 28 nm design. It is made up of 640 SPUs, 40 TAUs, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically, the GeForce GTX 660 should perform quite a bit faster than the Radeon R9 M375X in general. (explain)

GeForce GTX 660		144192 MB/sec
Radeon R9 M375X		72000 MB/sec
	Difference: 72192 (100%)

Texel Rate

The GeForce GTX 660 will be much (more or less 93%) faster with regards to AF than the Radeon R9 M375X. (explain)

GeForce GTX 660		78400 Mtexels/sec
Radeon R9 M375X		40600 Mtexels/sec
	Difference: 37800 (93%)

Pixel Rate

The GeForce GTX 660 should be much (about 45%) faster with regards to full screen anti-aliasing than the Radeon R9 M375X, and should be capable of handling higher screen resolutions without losing too much performance. (explain)

GeForce GTX 660		23520 Mpixels/sec
Radeon R9 M375X		16240 Mpixels/sec
	Difference: 7280 (45%)

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 data (counted in MB per second) that can be moved across the external memory interface within a second. It's worked out by multiplying the interface width by its memory speed. In the case of DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the card will be at handling 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 video card can possibly write to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of Render Output Units by the the core 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 output rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.