Radeon HD 6790 vs Radeon RX 560

Intro

Compare all of that to the Radeon RX 560, which features GPU clock speed of 1175 MHz, and 4096 MB of GDDR5 RAM running at 1750 MHz through a 128-bit bus. It also is made up of 1024 SPUs, 64 TAUs, 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 6790		150 Watts
	Difference: 70 Watts (88%)

Memory Bandwidth

Theoretically, the Radeon HD 6790 should be a little bit faster than the Radeon RX 560 in general. (explain)

Radeon HD 6790		134400 MB/sec
Radeon RX 560		114688 MB/sec
	Difference: 19712 (17%)

Texel Rate

The Radeon RX 560 is quite a bit (about 124%) more effective at texture filtering than the Radeon HD 6790. (explain)

Radeon RX 560		75200 Mtexels/sec
Radeon HD 6790		33600 Mtexels/sec
	Difference: 41600 (124%)

Pixel Rate

The Radeon RX 560 is much (approximately 40%) more effective at FSAA than the Radeon HD 6790, and should be able to handle higher screen resolutions without losing too much performance. (explain)

Radeon RX 560		18800 Mpixels/sec
Radeon HD 6790		13440 Mpixels/sec
	Difference: 5360 (40%)

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 data (in units of megabytes per second) that can be moved across the external memory interface in one second. The number is calculated by multiplying the card's bus width by its memory speed. If the card has DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, 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 number of texture map elements (texels) that can be processed in one second. This number is worked out by multiplying the total texture units of the card by the core speed of the chip. The better the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly record to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the the core 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 lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.