GeForce GTX 980M vs Radeon RX 560

Intro

Compare those specs to the Radeon RX 560, which comes with a clock frequency of 1175 MHz and a GDDR5 memory frequency of 1750 MHz. It also features a 128-bit memory bus, and makes use of a 14 nm design. It is comprised of 1024 SPUs, 64 TAUs, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 560		80 Watts
GeForce GTX 980M		100 Watts
	Difference: 20 Watts (25%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 980M should theoretically be just a bit better than the Radeon RX 560 overall. (explain)

GeForce GTX 980M		128000 MB/sec
Radeon RX 560		114688 MB/sec
	Difference: 13312 (12%)

Texel Rate

The GeForce GTX 980M will be a lot (about 33%) faster with regards to AF than the Radeon RX 560. (explain)

GeForce GTX 980M		99648 Mtexels/sec
Radeon RX 560		75200 Mtexels/sec
	Difference: 24448 (33%)

Pixel Rate

The GeForce GTX 980M is quite a bit (approximately 253%) faster with regards to anti-aliasing than the Radeon RX 560, and also will be able to handle higher screen resolutions without slowing down too much. (explain)

GeForce GTX 980M		66432 Mpixels/sec
Radeon RX 560		18800 Mpixels/sec
	Difference: 47632 (253%)

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

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also 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.