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Radeon HD 7990 vs Radeon RX 5600

Intro

The Radeon HD 7990 features a GPU clock 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 Texture Address Units, and 32 ROPs.

Compare those specifications to the Radeon RX 5600, which makes use of a 7 nm design. AMD has clocked the core speed at 1375 MHz. The GDDR6 memory runs at a speed of 1500 MHz on this particular model. It features 2048 SPUs along with 128 TAUs and 64 ROPs.

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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

Theoretically, the Radeon HD 7990 should be a lot 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 will be quite a bit (about 38%) more effective at texture filtering 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%) more effective at anti-aliasing than the Radeon HD 7990, and also capable of handling higher resolutions while still performing well. (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

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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) 3000 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: Memory bandwidth is the max amount of information (measured in megabytes per second) that can be transferred over the external memory interface within a second. It's calculated by multiplying the card's interface width by its memory speed. If it uses DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed per second. This number is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly record to its local memory per 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 filling the screen with pixels (the image). The actual pixel rate also depends on many other factors, especially the memory bandwidth - the lower the 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

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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