Radeon HD 7990 vs Radeon RX 5500 XT

Intro

Compare that to the Radeon RX 5500 XT, which has GPU core speed of 1717 MHz, and 8192 MB of GDDR6 RAM running at 1750 MHz through a 128-bit bus. It also is made up of 1408 Stream Processors, 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 a lot 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 should be much (approximately 61%) faster with regards to texture filtering 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 just a bit (more or less 11%) faster with regards to full screen anti-aliasing than the Radeon RX 5500 XT, and also should be able to handle higher screen resolutions more effectively. (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: Memory bandwidth is the largest amount of data (measured in MB per second) that can be transferred over the external memory interface within a second. It's calculated by multiplying the card's bus width by the speed of its memory. If the card has DDR memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly write 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 card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.