Radeon HD 6850 vs Radeon RX 560

Intro

Compare all that to the Radeon RX 560, which comes with GPU core speed of 1175 MHz, and 4096 MB of GDDR5 RAM running at 1750 MHz through a 128-bit bus. It also features 1024 Stream Processors, 64 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 560		80 Watts
Radeon HD 6850		127 Watts
	Difference: 47 Watts (59%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 6850 is 12% faster than the Radeon RX 560 overall, due to its greater bandwidth. (explain)

Radeon HD 6850		128000 MB/sec
Radeon RX 560		114688 MB/sec
	Difference: 13312 (12%)

Texel Rate

The Radeon RX 560 is much (approximately 102%) faster with regards to anisotropic filtering than the Radeon HD 6850. (explain)

Radeon RX 560		75200 Mtexels/sec
Radeon HD 6850		37200 Mtexels/sec
	Difference: 38000 (102%)

Pixel Rate

The Radeon HD 6850 will be much (approximately 32%) better at AA than the Radeon RX 560, and able to handle higher screen resolutions better. (explain)

Radeon HD 6850		24800 Mpixels/sec
Radeon RX 560		18800 Mpixels/sec
	Difference: 6000 (32%)

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 max amount of data (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 the speed of its memory. If the card has DDR RAM, the result should be multiplied by 2 once again. If it uses 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 in one second. This number is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The higher the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.