Radeon HD 7950 vs Radeon RX 560

Intro

Compare those specs to the Radeon RX 560, which comes with a clock speed of 1175 MHz and a GDDR5 memory speed of 1750 MHz. It also uses a 128-bit 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 HD 7950		200 Watts
	Difference: 120 Watts (150%)

Memory Bandwidth

Theoretically, the Radeon HD 7950 should be much faster than the Radeon RX 560 overall. (explain)

Radeon HD 7950		240000 MB/sec
Radeon RX 560		114688 MB/sec
	Difference: 125312 (109%)

Texel Rate

The Radeon HD 7950 is a bit (approximately 19%) faster with regards to texture filtering than the Radeon RX 560. (explain)

Radeon HD 7950		89600 Mtexels/sec
Radeon RX 560		75200 Mtexels/sec
	Difference: 14400 (19%)

Pixel Rate

The Radeon HD 7950 will be much (approximately 36%) more effective at AA than the Radeon RX 560, and should be capable of handling higher resolutions more effectively. (explain)

Radeon HD 7950		25600 Mpixels/sec
Radeon RX 560		18800 Mpixels/sec
	Difference: 6800 (36%)

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 largest amount of information (in units of MB per second) that can be moved across the external memory interface in a second. It's worked out by multiplying the card's bus width by its memory speed. If it uses DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.