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Radeon HD 7990 vs Radeon RX 560

Intro

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

Compare those specs to the Radeon RX 560, which comes with GPU clock speed of 1175 MHz, and 4096 MB of GDDR5 memory running at 7000 MHz through a 128-bit bus. It also is made up of 1024 SPUs, 64 TAUs, and 16 ROPs.

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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

Theoretically, the Radeon HD 7990 should be quite a bit faster than 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 is quite a bit (more or less 223%) more effective at anisotropic filtering than the Radeon RX 560. (explain)

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

Pixel Rate

The Radeon HD 7990 will be quite a bit (about 223%) more effective at full screen anti-aliasing than the Radeon RX 560, and also will be capable of handling higher resolutions without slowing down too much. (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

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.

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) 28000 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 maximum amount of data (in units of MB per second) that can be transferred over the external memory interface in a second. It's calculated by multiplying the bus width by its memory clock speed. If the card has DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This is worked out by multiplying the total number of texture units of the card by the core clock 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 applied per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

Hide Prices

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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