Radeon HD 7990 vs Radeon RX 5500 XT

Intro

Compare those specifications to the Radeon RX 5500 XT, which comes with a clock speed of 1717 MHz and a GDDR6 memory speed of 1750 MHz. It also features a 128-bit bus, and uses a 7 nm design. It is comprised of 1408 SPUs, 88 TAUs, and 32 Raster Operation Units.

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

In theory, the Radeon HD 7990 is 151% quicker than the Radeon RX 5500 XT overall, due to its higher data rate. (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 (about 61%) more effective at anisotropic 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 a little bit (about 11%) better at anti-aliasing 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: Memory bandwidth is the max amount of data (counted in megabytes per second) that can be moved past the external memory interface in a second. It is worked out by multiplying the bus width by the speed of its memory. In the case of DDR RAM, it must be multiplied by 2 once 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 AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This figure is worked out by multiplying the total number of texture units by the core speed of the chip. The better the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one 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. The figure is calculated by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.