Radeon R9 280X vs Radeon RX 560

Intro

Compare those specifications 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 along with 64 TAUs and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 560		80 Watts
Radeon R9 280X		250 Watts
	Difference: 170 Watts (213%)

Memory Bandwidth

As far as performance goes, the Radeon R9 280X should in theory be much better than the Radeon RX 560 in general. (explain)

Radeon R9 280X		288000 MB/sec
Radeon RX 560		114688 MB/sec
	Difference: 173312 (151%)

Texel Rate

The Radeon R9 280X should be much (about 45%) more effective at anisotropic filtering than the Radeon RX 560. (explain)

Radeon R9 280X		108800 Mtexels/sec
Radeon RX 560		75200 Mtexels/sec
	Difference: 33600 (45%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon R9 280X is a better choice, by far. (explain)

Radeon R9 280X		27200 Mpixels/sec
Radeon RX 560		18800 Mpixels/sec
	Difference: 8400 (45%)

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 largest amount of data (counted in megabytes per second) that can be transported over the external memory interface in one second. It's worked out by multiplying the card's bus width by its memory clock speed. If it uses DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed per second. This number is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The better the texel rate, the better the graphics card will be at 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 the video card could possibly write to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.