Radeon HD 7990 vs Radeon RX 5600 XT

Intro

Compare all that to the Radeon RX 5600 XT, which features a core clock frequency of 1375 MHz and a GDDR6 memory frequency of 1500 MHz. It also uses a 192-bit memory bus, and uses a 7 nm design. It is comprised of 2304 SPUs, 144 Texture Address Units, and 64 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 5600 XT		160 Watts
Radeon HD 7990		375 Watts
	Difference: 215 Watts (134%)

Memory Bandwidth

In theory, the Radeon HD 7990 is 67% faster than the Radeon RX 5600 XT overall, because of its greater bandwidth. (explain)

Radeon HD 7990		576000 MB/sec
Radeon RX 5600 XT		344064 MB/sec
	Difference: 231936 (67%)

Texel Rate

The Radeon HD 7990 should be a lot (approximately 23%) more effective at AF than the Radeon RX 5600 XT. (explain)

Radeon HD 7990		243200 Mtexels/sec
Radeon RX 5600 XT		198000 Mtexels/sec
	Difference: 45200 (23%)

Pixel Rate

If using a high resolution is important to you, then the Radeon RX 5600 XT is superior to the Radeon HD 7990, and very much so. (explain)

Radeon RX 5600 XT		88000 Mpixels/sec
Radeon HD 7990		60800 Mpixels/sec
	Difference: 27200 (45%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Bandwidth is the maximum amount of data (counted in MB per second) that can be transported across the external memory interface in one second. The number is calculated by multiplying the card's bus width by its memory speed. If it uses DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This is calculated by multiplying the total texture units by the core speed of the chip. The better this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.