Radeon HD 7970 vs Radeon RX 560

Intro

Compare all of that to the Radeon RX 560, which comes with 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

Power Consumption (Max TDP)

Radeon RX 560		80 Watts
Radeon HD 7970		250 Watts
	Difference: 170 Watts (213%)

Memory Bandwidth

The Radeon HD 7970 should theoretically be much faster than the Radeon RX 560 in general. (explain)

Radeon HD 7970		264000 MB/sec
Radeon RX 560		114688 MB/sec
	Difference: 149312 (130%)

Texel Rate

The Radeon HD 7970 will be a lot (approximately 57%) faster with regards to texture filtering than the Radeon RX 560. (explain)

Radeon HD 7970		118400 Mtexels/sec
Radeon RX 560		75200 Mtexels/sec
	Difference: 43200 (57%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon HD 7970 is a better choice, by far. (explain)

Radeon HD 7970		29600 Mpixels/sec
Radeon RX 560		18800 Mpixels/sec
	Difference: 10800 (57%)

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 (measured in megabytes per second) that can be transferred across the external memory interface in a second. It's calculated by multiplying the card's bus width by the speed of its memory. If the card has DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This is calculated 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 card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly record to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.