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Radeon HD 7990 vs Radeon RX 5600 XT

Intro

The Radeon HD 7990 features a GPU core speed of 950 MHz, and the 3072 MB of GDDR5 memory runs at 1500 MHz through a 384-bit bus. It also features 2048 SPUs, 128 TAUs, and 32 ROPs.

Compare those specs to the Radeon RX 5600 XT, which features a clock frequency of 1375 MHz and a GDDR6 memory speed of 1500 MHz. It also uses a 192-bit bus, and makes use of a 7 nm design. It features 2304 SPUs, 144 Texture Address Units, and 64 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 5600 XT 160 Watts
Radeon HD 7990 375 Watts
Difference: 215 Watts (134%)

Memory Bandwidth

In theory, the Radeon HD 7990 will be 67% faster than the Radeon RX 5600 XT in general, due to its greater bandwidth. (explain)

Radeon HD 7990 576000 MB/sec
Radeon RX 5600 XT 344064 MB/sec
Difference: 231936 (67%)

Texel Rate

The Radeon HD 7990 should be much (approximately 23%) faster with regards to texture filtering than the Radeon RX 5600 XT. (explain)

Radeon HD 7990 243200 Mtexels/sec
Radeon RX 5600 XT 198000 Mtexels/sec
Difference: 45200 (23%)

Pixel Rate

The Radeon RX 5600 XT should be a lot (more or less 45%) faster with regards to AA than the Radeon HD 7990, and also able to handle higher resolutions without losing too much performance. (explain)

Radeon RX 5600 XT 88000 Mpixels/sec
Radeon HD 7990 60800 Mpixels/sec
Difference: 27200 (45%)

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

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Radeon HD 7990

Amazon.com

Check prices at:

Radeon RX 5600 XT

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

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Model Radeon HD 7990 Radeon RX 5600 XT
Manufacturer AMD AMD
Year April 2013 January 2020
Code Name Malta Navi 10 XLE
Memory 3072 MB (x2) 6144 MB
Core Speed 950 MHz (x2) 1375 MHz
Memory Speed 6000 MHz (x2) 3000 GB/s
Power (Max TDP) 375 watts 160 watts
Bandwidth 576000 MB/sec 344064 MB/sec
Texel Rate 243200 Mtexels/sec 198000 Mtexels/sec
Pixel Rate 60800 Mpixels/sec 88000 Mpixels/sec
Unified Shaders 2048 (x2) 2304
Texture Mapping Units 128 (x2) 144
Render Output Units 32 (x2) 64
Bus Type GDDR5 GDDR6
Bus Width 384-bit (x2) 192-bit
Fab Process 28 nm 7 nm
Transistors 4313 million 10300 million
Bus PCIe 3.0 x16 PCIe 4.0 ×16
DirectX Version DirectX 11.1 DirectX 12
OpenGL Version OpenGL 4.3 OpenGL 4.6

Memory Bandwidth: Bandwidth is the max amount of information (in units of MB per second) that can be moved over the external memory interface within a second. It's calculated by multiplying the card's interface width by the speed of its memory. If it uses DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, 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 in one second. This number is worked out by multiplying the total texture units of the card by the core speed of the chip. The better this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

Hide Prices

Radeon HD 7990

Amazon.com

Check prices at:

Radeon RX 5600 XT

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

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