Radeon HD 7990 vs Radeon RX 5500

Intro

Compare all that to the Radeon RX 5500, which comes with core clock speeds of 1670 MHz on the GPU, and 1750 MHz on the 4096 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		150 Watts
Radeon HD 7990		375 Watts
	Difference: 225 Watts (150%)

Memory Bandwidth

In theory, the Radeon HD 7990 will be 151% quicker than the Radeon RX 5500 in general, because of its higher data rate. (explain)

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

Texel Rate

The Radeon HD 7990 is much (approximately 65%) faster with regards to anisotropic filtering than the Radeon RX 5500. (explain)

Radeon HD 7990		243200 Mtexels/sec
Radeon RX 5500		146960 Mtexels/sec
	Difference: 96240 (65%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon HD 7990 is the winner, but it probably won't make a huge difference. (explain)

Radeon HD 7990		60800 Mpixels/sec
Radeon RX 5500		53440 Mpixels/sec
	Difference: 7360 (14%)

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 information (counted in MB per second) that can be transported past the external memory interface in a second. It is worked out by multiplying the card's interface width by its memory speed. In the case of DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card could possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out 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 output rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.