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Radeon HD 7990 vs Radeon RX 5600

Intro

The Radeon HD 7990 comes with a GPU clock speed of 950 MHz, and the 3072 MB of GDDR5 RAM is set to run at 1500 MHz through a 384-bit bus. It also is made up of 2048 SPUs, 128 TAUs, and 32 Raster Operation Units.

Compare all that to the Radeon RX 5600, which features GPU clock speed of 1375 MHz, and 6144 MB of GDDR6 memory running at 12000 MHz through a 192-bit bus. It also is made up of 2048 Stream Processors, 128 TAUs, and 64 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 5600 150 Watts
Radeon HD 7990 375 Watts
Difference: 225 Watts (150%)

Memory Bandwidth

In theory, the Radeon HD 7990 should perform quite a bit faster than the Radeon RX 5600 overall. (explain)

Radeon HD 7990 576000 MB/sec
Radeon RX 5600 294912 MB/sec
Difference: 281088 (95%)

Texel Rate

The Radeon HD 7990 is much (about 38%) better at AF than the Radeon RX 5600. (explain)

Radeon HD 7990 243200 Mtexels/sec
Radeon RX 5600 176000 Mtexels/sec
Difference: 67200 (38%)

Pixel Rate

The Radeon RX 5600 is quite a bit (about 45%) faster with regards to AA than the Radeon HD 7990, and able to handle higher screen resolutions more effectively. (explain)

Radeon RX 5600 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

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
Manufacturer AMD AMD
Year April 2013 January 2020
Code Name Malta Navi 10 XE
Memory 3072 MB (x2) 6144 MB
Core Speed 950 MHz (x2) 1375 MHz
Memory Speed 6000 MHz (x2) 24000 GB/s
Power (Max TDP) 375 watts 150 watts
Bandwidth 576000 MB/sec 294912 MB/sec
Texel Rate 243200 Mtexels/sec 176000 Mtexels/sec
Pixel Rate 60800 Mpixels/sec 88000 Mpixels/sec
Unified Shaders 2048 (x2) 2048
Texture Mapping Units 128 (x2) 128
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 transported over the external memory interface in one second. The number is calculated by multiplying the interface width by the speed of its memory. In the case of DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied in one second. This is calculated by multiplying the total number of texture units by the core speed of the chip. The higher the texel rate, the better the 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 write to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

Hide Prices

Radeon HD 7990

Amazon.com

Check prices at:

Radeon RX 5600

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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