Radeon HD 7790 vs Radeon RX 560

Intro

Compare that 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 TAUs and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 560		80 Watts
Radeon HD 7790		85 Watts
	Difference: 5 Watts (6%)

Memory Bandwidth

In theory, the Radeon RX 560 will be 19% quicker than the Radeon HD 7790 overall, because of its greater data rate. (explain)

Radeon RX 560		114688 MB/sec
Radeon HD 7790		96000 MB/sec
	Difference: 18688 (19%)

Texel Rate

The Radeon RX 560 should be much (about 34%) faster with regards to anisotropic filtering than the Radeon HD 7790. (explain)

Radeon RX 560		75200 Mtexels/sec
Radeon HD 7790		56000 Mtexels/sec
	Difference: 19200 (34%)

Pixel Rate

The Radeon RX 560 will be a bit (more or less 18%) more effective at FSAA than the Radeon HD 7790, and should be able to handle higher resolutions better. (explain)

Radeon RX 560		18800 Mpixels/sec
Radeon HD 7790		16000 Mpixels/sec
	Difference: 2800 (18%)

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 (measured in MB per second) that can be transported over the external memory interface within a second. The number is worked out by multiplying the card's bus width by its memory speed. If the card has DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the better 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 number of texture map elements (texels) that are applied in one second. This is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The better the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill 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.