Radeon HD 6950 vs Radeon RX 560

Intro

Compare those specifications to the Radeon RX 560, which comes with clock speeds of 1175 MHz on the GPU, and 1750 MHz on the 4096 MB of GDDR5 RAM. It features 1024 SPUs as well as 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 6950		200 Watts
	Difference: 120 Watts (150%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 6950 is 40% faster than the Radeon RX 560 overall, due to its greater data rate. (explain)

Radeon HD 6950		160000 MB/sec
Radeon RX 560		114688 MB/sec
	Difference: 45312 (40%)

Texel Rate

The Radeon RX 560 will be a small bit (about 7%) more effective at texture filtering than the Radeon HD 6950. (explain)

Radeon RX 560		75200 Mtexels/sec
Radeon HD 6950		70400 Mtexels/sec
	Difference: 4800 (7%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon HD 6950 is the winner, by far. (explain)

Radeon HD 6950		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: Memory bandwidth is the maximum amount of information (counted in 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 the speed of its memory. If it uses DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better 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 texture map elements (texels) that are processed per second. This is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units 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 output rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.