Radeon HD 7990 vs Radeon RX 5500 XT

Intro

Compare all that to the Radeon RX 5500 XT, which makes use of a 7 nm design. AMD has set the core frequency at 1717 MHz. The GDDR6 memory is set to run at a speed of 1750 MHz on this specific model. 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 theoretically be much superior to the Radeon RX 5500 XT overall. (explain)

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

Texel Rate

The Radeon HD 7990 is much (more or less 61%) faster with regards to 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 little bit (more or less 11%) faster with regards to FSAA than the Radeon RX 5500 XT, and also will be capable of handling higher screen resolutions while still performing well. (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 max amount of information (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 card's bus width by its memory speed. If the card has DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied in one second. This figure is calculated by multiplying the total amount of 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 in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output 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 reach the max fill rate.