GeForce GTX 660 vs Radeon R9 M365X

Intro

Compare all that to the Radeon R9 M365X, which features clock speeds of 925 MHz on the GPU, and 1125 MHz on the 4096 MB of GDDR5 RAM. It features 640 SPUs as well as 40 TAUs and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

The GeForce GTX 660 should theoretically be quite a bit faster than the Radeon R9 M365X in general. (explain)

GeForce GTX 660		144192 MB/sec
Radeon R9 M365X		72000 MB/sec
	Difference: 72192 (100%)

Texel Rate

The GeForce GTX 660 should be a lot (approximately 112%) more effective at AF than the Radeon R9 M365X. (explain)

GeForce GTX 660		78400 Mtexels/sec
Radeon R9 M365X		37000 Mtexels/sec
	Difference: 41400 (112%)

Pixel Rate

The GeForce GTX 660 will be quite a bit (approximately 59%) more effective at full screen anti-aliasing than the Radeon R9 M365X, and also will be able to handle higher screen resolutions better. (explain)

GeForce GTX 660		23520 Mpixels/sec
Radeon R9 M365X		14800 Mpixels/sec
	Difference: 8720 (59%)

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 information (measured in MB per second) that can be transferred 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 it uses DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This number is calculated 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 handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly write to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.