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Radeon HD 7990 vs Radeon RX 5600 XT

Intro

The Radeon HD 7990 features a core clock frequency of 950 MHz and a GDDR5 memory speed of 1500 MHz. It also makes use of a 384-bit memory bus, and makes use of a 28 nm design. It features 2048 SPUs, 128 Texture Address Units, and 32 ROPs.

Compare all of that to the Radeon RX 5600 XT, which has clock speeds of 1375 MHz on the GPU, and 14000 MHz on the 6144 MB of GDDR6 RAM. It features 2304 SPUs as well as 144 Texture Address Units and 64 ROPs.

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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 higher 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

If running with high levels of AA is important to you, then the Radeon RX 5600 XT is the winner, by a large margin. (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) 28000 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: Memory bandwidth is the largest amount of data (counted in megabytes per second) that can be moved across the external memory interface within a second. It's calculated by multiplying the interface width by the speed of its memory. If the card has DDR memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, 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 processed in one second. This number is worked out by multiplying the total number of texture units by the core speed of the chip. The better this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly record to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential 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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