GeForce GTX 660 vs Radeon RX 560

Intro

Compare those specs to the Radeon RX 560, which has clock speeds of 1175 MHz on the GPU, and 1750 MHz on the 4096 MB of GDDR5 memory. It features 1024 SPUs as well as 64 Texture Address Units and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 560		80 Watts
GeForce GTX 660		140 Watts
	Difference: 60 Watts (75%)

Memory Bandwidth

The GeForce GTX 660, in theory, should perform much faster than the Radeon RX 560 overall. (explain)

GeForce GTX 660		144192 MB/sec
Radeon RX 560		114688 MB/sec
	Difference: 29504 (26%)

Texel Rate

The GeForce GTX 660 is a small bit (approximately 4%) better at texture filtering than the Radeon RX 560. (explain)

GeForce GTX 660		78400 Mtexels/sec
Radeon RX 560		75200 Mtexels/sec
	Difference: 3200 (4%)

Pixel Rate

The GeForce GTX 660 should be quite a bit (more or less 25%) better at AA than the Radeon RX 560, and also able to handle higher resolutions more effectively. (explain)

GeForce GTX 660		23520 Mpixels/sec
Radeon RX 560		18800 Mpixels/sec
	Difference: 4720 (25%)

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 megabytes per second) that can be transported past the external memory interface in a second. The number is worked out by multiplying the card's bus width by the speed of its memory. In the case of DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better 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 texture map elements (texels) that can be applied per second. This figure is calculated by multiplying the total number of texture units by the core clock speed of the chip. The higher this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.