GeForce GTX 870M vs Radeon RX 560

Intro

Compare those specs to the Radeon RX 560, which comes with GPU core speed of 1175 MHz, and 4096 MB of GDDR5 memory running at 1750 MHz through a 128-bit bus. It also is comprised of 1024 Stream Processors, 64 Texture Address Units, 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 870M		110 Watts
	Difference: 30 Watts (38%)

Memory Bandwidth

Performance-wise, the Radeon RX 560 should in theory be just a bit better than the GeForce GTX 870M overall. (explain)

Radeon RX 560		114688 MB/sec
GeForce GTX 870M		96000 MB/sec
	Difference: 18688 (19%)

Texel Rate

The GeForce GTX 870M will be much (more or less 40%) better at anisotropic filtering than the Radeon RX 560. (explain)

GeForce GTX 870M		105392 Mtexels/sec
Radeon RX 560		75200 Mtexels/sec
	Difference: 30192 (40%)

Pixel Rate

The GeForce GTX 870M will be just a bit (more or less 20%) faster with regards to FSAA than the Radeon RX 560, and should be capable of handling higher screen resolutions without slowing down too much. (explain)

GeForce GTX 870M		22584 Mpixels/sec
Radeon RX 560		18800 Mpixels/sec
	Difference: 3784 (20%)

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 moved over the external memory interface in a second. The number is calculated by multiplying the interface width by the speed of its memory. In the case of DDR RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high 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 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 handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as 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 - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.