Radeon HD 7990 vs Radeon RX 5500 XT

Intro

Compare all that to the Radeon RX 5500 XT, which has clock speeds of 1717 MHz on the GPU, and 1750 MHz on the 8192 MB of GDDR6 RAM. It features 1408 SPUs as well as 88 TAUs and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 5500 XT		130 Watts
Radeon HD 7990		375 Watts
	Difference: 245 Watts (188%)

Memory Bandwidth

As far as performance goes, the Radeon HD 7990 should in theory be quite a bit superior to the Radeon RX 5500 XT in general. (explain)

Radeon HD 7990		576000 MB/sec
Radeon RX 5500 XT		229376 MB/sec
	Difference: 346624 (151%)

Texel Rate

The Radeon HD 7990 will be much (approximately 61%) more effective at AF than the Radeon RX 5500 XT. (explain)

Radeon HD 7990		243200 Mtexels/sec
Radeon RX 5500 XT		151096 Mtexels/sec
	Difference: 92104 (61%)

Pixel Rate

The Radeon HD 7990 is a bit (more or less 11%) faster with regards to FSAA than the Radeon RX 5500 XT, and able to handle higher screen resolutions without losing too much performance. (explain)

Radeon HD 7990		60800 Mpixels/sec
Radeon RX 5500 XT		54944 Mpixels/sec
	Difference: 5856 (11%)

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 largest amount of data (in units of MB per second) that can be transferred over the external memory interface in one second. The number is worked out by multiplying the bus width by its memory clock speed. If it uses DDR type memory, it must be multiplied by 2 again. If it uses 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 higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied per second. This number is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.