Radeon HD 7790 vs Radeon RX 560

Intro

Compare those specifications to the Radeon RX 560, which has a GPU core clock speed of 1175 MHz, and 4096 MB of GDDR5 memory running at 1750 MHz through a 128-bit bus. It also features 1024 SPUs, 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 7790		85 Watts
	Difference: 5 Watts (6%)

Memory Bandwidth

Theoretically speaking, the Radeon RX 560 should be a small bit faster than the Radeon HD 7790 overall. (explain)

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

Texel Rate

The Radeon RX 560 is quite a bit (more or less 34%) faster with regards to AF 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 little bit (approximately 18%) better at anti-aliasing than the Radeon HD 7790, and also will be capable of handling higher resolutions without slowing down too much. (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 maximum amount of information (in units of MB per second) that can be moved past the external memory interface in one second. The number is worked out by multiplying the card's bus width by the speed of its memory. If it uses DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This is calculated by multiplying the total number of texture units of the card 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 could possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour 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 fill rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.