GeForce GTX 660 vs Radeon R9 M375X

Intro

Compare all of that to the Radeon R9 M375X, which has a GPU core clock speed of 1015 MHz, and 4096 MB of GDDR5 RAM running at 1125 MHz through a 128-bit bus. It also is made up of 640 Stream Processors, 40 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the GeForce GTX 660 should be much 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 is a lot (more or less 93%) more effective at texture filtering than the Radeon R9 M375X. (explain)

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

Pixel Rate

If using high levels of AA is important to you, then the GeForce GTX 660 is a better choice, by a large margin. (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: Bandwidth is the maximum amount of data (in units of MB per second) that can be transported past the external memory interface within a second. It's worked out by multiplying the card's interface width by the speed of its memory. If the card has DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This number is calculated by multiplying the total amount of texture units by the core speed of the chip. The better this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly record to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.