Radeon HD 7990 vs Radeon RX 5600 XT

Intro

Compare those specifications to the Radeon RX 5600 XT, which comes with GPU clock speed of 1375 MHz, and 6144 MB of GDDR6 RAM running at 14000 MHz through a 192-bit bus. It also is comprised of 2304 SPUs, 144 Texture Address Units, and 64 ROPs.

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

Theoretically speaking, the Radeon HD 7990 should be much faster than the Radeon RX 5600 XT overall. (explain)

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

Texel Rate

The Radeon HD 7990 is quite a bit (approximately 23%) faster with regards to 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

The Radeon RX 5600 XT will be much (about 45%) more effective at AA than the Radeon HD 7990, and capable of handling higher screen resolutions better. (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 (counted in megabytes per second) that can be moved over the external memory interface in one second. It is calculated by multiplying the interface width by the speed of its memory. If it uses DDR type RAM, it should 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 texture map elements (texels) that are processed per second. This figure is worked out by multiplying the total amount of texture units by the core speed of the chip. The better this number, the better the 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 the video card can possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount 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 fill rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.