Radeon HD 7990 vs Radeon RX 5600 XT

Intro

Compare those specs to the Radeon RX 5600 XT, which features a clock frequency of 1375 MHz and a GDDR6 memory speed of 1500 MHz. It also uses a 192-bit bus, and makes use of a 7 nm design. It features 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 will be 67% faster than the Radeon RX 5600 XT in general, due to 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 much (approximately 23%) faster with regards to texture filtering 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

The Radeon RX 5600 XT should be a lot (more or less 45%) faster with regards to AA than the Radeon HD 7990, and also able to handle higher resolutions without losing too much performance. (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 max amount of information (in units of MB per second) that can be moved over the external memory interface within a second. It's calculated by multiplying the card's interface width by the speed of its memory. If it uses DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied 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 this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.