GeForce GTX 980M vs Radeon RX 560

Intro

Compare all of that to the Radeon RX 560, which has GPU core speed of 1175 MHz, and 4096 MB of GDDR5 RAM running at 1750 MHz through a 128-bit bus. It also is comprised of 1024 SPUs, 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 980M		100 Watts
	Difference: 20 Watts (25%)

Memory Bandwidth

The GeForce GTX 980M should in theory be just a bit faster than the Radeon RX 560 in general. (explain)

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

Texel Rate

The GeForce GTX 980M should be much (more or less 33%) better at texture filtering 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 will be much (approximately 253%) more effective at AA than the Radeon RX 560, and should be able to handle higher resolutions better. (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 maximum amount of information (in units of MB per second) that can be transported over the external memory interface within a second. The number is calculated by multiplying the interface width by the speed of its memory. If the card has DDR memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This figure is worked out by multiplying the total number of texture units by the core clock speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs by the clock speed of the card. 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 also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.