GeForce GTX 580 vs Radeon RX 560

Intro

Compare those specs to the Radeon RX 560, which has a clock speed of 1175 MHz and a GDDR5 memory speed of 1750 MHz. It also features a 128-bit bus, and uses a 14 nm design. It 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 580		244 Watts
	Difference: 164 Watts (205%)

Memory Bandwidth

In theory, the GeForce GTX 580 is 68% quicker than the Radeon RX 560 in general, because of its higher data rate. (explain)

GeForce GTX 580		192384 MB/sec
Radeon RX 560		114688 MB/sec
	Difference: 77696 (68%)

Texel Rate

The Radeon RX 560 is quite a bit (more or less 52%) more effective at texture filtering than the GeForce GTX 580. (explain)

Radeon RX 560		75200 Mtexels/sec
GeForce GTX 580		49408 Mtexels/sec
	Difference: 25792 (52%)

Pixel Rate

The GeForce GTX 580 will be much (about 97%) better at AA than the Radeon RX 560, and also will be capable of handling higher screen resolutions more effectively. (explain)

GeForce GTX 580		37056 Mpixels/sec
Radeon RX 560		18800 Mpixels/sec
	Difference: 18256 (97%)

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 bus width by its memory clock speed. If the card has DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This is calculated by multiplying the total amount of texture units by the core speed of the chip. The better the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Render Output Units 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 output rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.