Radeon R7 250X 2GB vs Radeon RX 560

Intro

Compare those specifications to the Radeon RX 560, which comes with a clock speed of 1175 MHz and a GDDR5 memory speed of 1750 MHz. It also features a 128-bit memory bus, and uses a 14 nm design. It is made up 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
Radeon R7 250X 2GB		95 Watts
	Difference: 15 Watts (19%)

Memory Bandwidth

The Radeon RX 560 should theoretically be quite a bit faster than the Radeon R7 250X 2GB overall. (explain)

Radeon RX 560		114688 MB/sec
Radeon R7 250X 2GB		72000 MB/sec
	Difference: 42688 (59%)

Texel Rate

The Radeon RX 560 should be quite a bit (about 88%) more effective at AF than the Radeon R7 250X 2GB. (explain)

Radeon RX 560		75200 Mtexels/sec
Radeon R7 250X 2GB		40000 Mtexels/sec
	Difference: 35200 (88%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon RX 560 is a better choice, though only just barely. (explain)

Radeon RX 560		18800 Mpixels/sec
Radeon R7 250X 2GB		16000 Mpixels/sec
	Difference: 2800 (18%)

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: Bandwidth is the max amount of information (counted in megabytes per second) that can be moved across the external memory interface in one second. The number is worked out by multiplying the card's interface width by its memory clock speed. In the case of DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This number is worked out by multiplying the total number of texture units of the card by the core 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 a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly record to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.