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Radeon HD 7790 vs Radeon RX 590

Intro

The Radeon HD 7790 comes with core clock speeds of 1000 MHz on the GPU, and 1500 MHz on the 1024 MB of GDDR5 memory. It features 896 SPUs along with 56 Texture Address Units and 16 Rasterization Operator Units.

Compare those specs to the Radeon RX 590, which features a GPU core clock speed of 1469 MHz, and 8192 MB of GDDR5 memory running at 2000 MHz through a 256-bit bus. It also features 2304 SPUs, 144 TAUs, and 32 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7790 85 Watts
Radeon RX 590 175 Watts
Difference: 90 Watts (106%)

Memory Bandwidth

Performance-wise, the Radeon RX 590 should theoretically be much better than the Radeon HD 7790 overall. (explain)

Radeon RX 590 262144 MB/sec
Radeon HD 7790 96000 MB/sec
Difference: 166144 (173%)

Texel Rate

The Radeon RX 590 should be a lot (about 278%) faster with regards to anisotropic filtering than the Radeon HD 7790. (explain)

Radeon RX 590 211536 Mtexels/sec
Radeon HD 7790 56000 Mtexels/sec
Difference: 155536 (278%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon RX 590 is the winner, and very much so. (explain)

Radeon RX 590 47008 Mpixels/sec
Radeon HD 7790 16000 Mpixels/sec
Difference: 31008 (194%)

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.

Price Comparison

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Radeon HD 7790

Amazon.com

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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 7790 Radeon RX 590
Manufacturer AMD AMD
Year March 2013 November 2018
Code Name Bonaire XT Polaris 30
Memory 1024 MB 8192 MB
Core Speed 1000 MHz 1469 MHz
Memory Speed 6000 MHz 8000 MHz
Power (Max TDP) 85 watts 175 watts
Bandwidth 96000 MB/sec 262144 MB/sec
Texel Rate 56000 Mtexels/sec 211536 Mtexels/sec
Pixel Rate 16000 Mpixels/sec 47008 Mpixels/sec
Unified Shaders 896 2304
Texture Mapping Units 56 144
Render Output Units 16 32
Bus Type GDDR5 GDDR5
Bus Width 128-bit 256-bit
Fab Process 28 nm 12 nm
Transistors 2080 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: Bandwidth is the maximum amount of information (counted in megabytes per second) that can be transported across the external memory interface in a second. It's calculated by multiplying the interface width by its memory clock speed. If it uses DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Display Prices

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Radeon HD 7790

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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