Radeon HD 6790 vs Radeon RX 560

Intro

Compare those specs to the Radeon RX 560, which uses a 14 nm design. AMD has clocked the core speed at 1175 MHz. The GDDR5 memory runs at a frequency of 1750 MHz on this specific model. It features 1024 SPUs along with 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

As far as performance goes, the Radeon HD 6790 should in theory be just a bit better 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 (approximately 124%) faster with regards to AF than the Radeon HD 6790. (explain)

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

Pixel Rate

If using a high screen resolution is important to you, then the Radeon RX 560 is the winner, by far. (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: Memory bandwidth is the max amount of data (counted in megabytes per second) that can be transported across the external memory interface in one second. It's calculated by multiplying the card's interface width by its memory clock speed. If it uses 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 anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed in one second. This is worked out by multiplying the total texture units by the core clock speed of the chip. The higher the texel rate, the better the graphics card will be at handling 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 write to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.