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Radeon HD 7790 vs Radeon RX 590

Intro

The Radeon HD 7790 has a clock speed of 1000 MHz and a GDDR5 memory speed of 1500 MHz. It also features a 128-bit memory bus, and makes use of a 28 nm design. It is made up of 896 SPUs, 56 Texture Address Units, and 16 ROPs.

Compare that to the Radeon RX 590, which features a clock frequency of 1469 MHz and a GDDR5 memory frequency of 2000 MHz. It also makes use of a 256-bit memory bus, and uses a 12 nm design. It is comprised of 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

The Radeon RX 590 should theoretically perform quite a bit faster than the Radeon HD 7790 in general. (explain)

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

Texel Rate

The Radeon RX 590 is a lot (approximately 278%) better at AF than the Radeon HD 7790. (explain)

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

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon RX 590 is a better choice, 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

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 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 data (in units of MB per second) that can be transported over the external memory interface in one second. The number is worked out by multiplying the card's bus width by its memory speed. If it uses DDR RAM, it must be multiplied by 2 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 anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied in one second. This figure is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output 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 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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