Radeon R9 M265X vs Radeon RX 560

Intro

Compare those specs to the Radeon RX 560, which has GPU core speed of 1175 MHz, and 4096 MB of GDDR5 memory set to run at 1750 MHz through a 128-bit bus. It also features 1024 SPUs, 64 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon RX 560 should be 59% faster than the Radeon R9 M265X overall, because of its higher bandwidth. (explain)

Radeon RX 560		114688 MB/sec
Radeon R9 M265X		72000 MB/sec
	Difference: 42688 (59%)

Texel Rate

The Radeon RX 560 is quite a bit (about 227%) more effective at texture filtering than the Radeon R9 M265X. (explain)

Radeon RX 560		75200 Mtexels/sec
Radeon R9 M265X		23000 Mtexels/sec
	Difference: 52200 (227%)

Pixel Rate

The Radeon RX 560 is quite a bit (about 104%) faster with regards to anti-aliasing than the Radeon R9 M265X, and should be able to handle higher resolutions while still performing well. (explain)

Radeon RX 560		18800 Mpixels/sec
Radeon R9 M265X		9200 Mpixels/sec
	Difference: 9600 (104%)

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 (in units of megabytes per second) that can be transported over the external memory interface in one second. It's calculated by multiplying the card's bus width by its memory clock speed. If the card has DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the 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 amount of texture map elements (texels) that are applied per second. This figure is calculated by multiplying the total texture units of the card by the core speed of the chip. The better this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill 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 maximum fill rate.