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Radeon HD 7990 vs Radeon RX 560

Intro

The Radeon HD 7990 uses a 28 nm design. AMD has clocked the core frequency at 950 MHz. The GDDR5 RAM is set to run at a frequency of 1500 MHz on this particular model. It features 2048 SPUs along with 128 Texture Address Units and 32 Rasterization Operator Units.

Compare those specs to the Radeon RX 560, which has GPU clock speed of 1175 MHz, and 4096 MB of GDDR5 RAM running at 1750 MHz through a 128-bit bus. It also is made up of 1024 Stream Processors, 64 Texture Address Units, and 16 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 560 80 Watts
Radeon HD 7990 375 Watts
Difference: 295 Watts (369%)

Memory Bandwidth

As far as performance goes, the Radeon HD 7990 should in theory be quite a bit superior to the Radeon RX 560 overall. (explain)

Radeon HD 7990 576000 MB/sec
Radeon RX 560 114688 MB/sec
Difference: 461312 (402%)

Texel Rate

The Radeon HD 7990 will be much (more or less 223%) faster with regards to AF than the Radeon RX 560. (explain)

Radeon HD 7990 243200 Mtexels/sec
Radeon RX 560 75200 Mtexels/sec
Difference: 168000 (223%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon HD 7990 is the winner, by far. (explain)

Radeon HD 7990 60800 Mpixels/sec
Radeon RX 560 18800 Mpixels/sec
Difference: 42000 (223%)

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 560

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 560
Manufacturer AMD AMD
Year April 2013 May 2017
Code Name Malta Baffin
Memory 3072 MB (x2) 4096 MB
Core Speed 950 MHz (x2) 1175 MHz
Memory Speed 6000 MHz (x2) 7000 MHz
Power (Max TDP) 375 watts 80 watts
Bandwidth 576000 MB/sec 114688 MB/sec
Texel Rate 243200 Mtexels/sec 75200 Mtexels/sec
Pixel Rate 60800 Mpixels/sec 18800 Mpixels/sec
Unified Shaders 2048 (x2) 1024
Texture Mapping Units 128 (x2) 64
Render Output Units 32 (x2) 16
Bus Type GDDR5 GDDR5
Bus Width 384-bit (x2) 128-bit
Fab Process 28 nm 14 nm
Transistors 4313 million 3000 million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 11.1 DirectX 12.0
OpenGL Version OpenGL 4.3 OpenGL 4.6

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

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Radeon HD 7990

Amazon.com

Check prices at:

Radeon RX 560

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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