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Radeon HD 7990 vs Radeon RX 590

Intro

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

Compare all of that to the Radeon RX 590, which uses a 12 nm design. AMD has clocked the core frequency at 1469 MHz. The GDDR5 RAM runs at a frequency of 2000 MHz on this specific card. It features 2304 SPUs as well as 144 Texture Address Units and 32 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 590 175 Watts
Radeon HD 7990 375 Watts
Difference: 200 Watts (114%)

Memory Bandwidth

In theory, the Radeon HD 7990 will be 120% quicker than the Radeon RX 590 overall, because of its greater bandwidth. (explain)

Radeon HD 7990 576000 MB/sec
Radeon RX 590 262144 MB/sec
Difference: 313856 (120%)

Texel Rate

The Radeon HD 7990 is a little bit (approximately 15%) faster with regards to anisotropic filtering than the Radeon RX 590. (explain)

Radeon HD 7990 243200 Mtexels/sec
Radeon RX 590 211536 Mtexels/sec
Difference: 31664 (15%)

Pixel Rate

The Radeon HD 7990 should be quite a bit (more or less 29%) better at AA than the Radeon RX 590, and also able to handle higher resolutions more effectively. (explain)

Radeon HD 7990 60800 Mpixels/sec
Radeon RX 590 47008 Mpixels/sec
Difference: 13792 (29%)

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 590

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 590
Manufacturer AMD AMD
Year April 2013 November 2018
Code Name Malta Polaris 30
Memory 3072 MB (x2) 8192 MB
Core Speed 950 MHz (x2) 1469 MHz
Memory Speed 6000 MHz (x2) 8000 MHz
Power (Max TDP) 375 watts 175 watts
Bandwidth 576000 MB/sec 262144 MB/sec
Texel Rate 243200 Mtexels/sec 211536 Mtexels/sec
Pixel Rate 60800 Mpixels/sec 47008 Mpixels/sec
Unified Shaders 2048 (x2) 2304
Texture Mapping Units 128 (x2) 144
Render Output Units 32 (x2) 32
Bus Type GDDR5 GDDR5
Bus Width 384-bit (x2) 256-bit
Fab Process 28 nm 12 nm
Transistors 4313 million 5700 million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 11.1 DirectX 12.0
OpenGL Version OpenGL 4.3 OpenGL 4.5

Memory Bandwidth: Memory bandwidth is the largest amount of information (measured in megabytes per second) that can be transferred over the external memory interface in a second. The number is calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR type memory, it should be multiplied by 2 once 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 high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This number is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The better the texel rate, the better the 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 chip could possibly record to its local memory in a 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 sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on many other factors, especially 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 590

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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