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Radeon HD 7790 vs Radeon RX 590

Intro

The Radeon HD 7790 has 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 ROPs.

Compare those specs to the Radeon RX 590, which has a core clock frequency of 1469 MHz and a GDDR5 memory speed of 2000 MHz. It also uses a 256-bit bus, and makes use of a 12 nm design. It is made up of 2304 SPUs, 144 Texture Address Units, and 32 Raster Operation Units.

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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

In theory, the Radeon RX 590 should be 173% quicker than the Radeon HD 7790 overall, due to its greater data rate. (explain)

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

Texel Rate

The Radeon RX 590 will be much (approximately 278%) faster with regards to texture filtering than the Radeon HD 7790. (explain)

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

Pixel Rate

The Radeon RX 590 will be a lot (approximately 194%) more effective at full screen anti-aliasing than the Radeon HD 7790, and should be able to handle higher resolutions more effectively. (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 largest amount of data (measured in megabytes per second) that can be transferred across the external memory interface in one second. The number is worked out by multiplying the card's interface width by the speed of its memory. In the case of DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster 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 amount of texture map elements (texels) that are applied in one second. This figure is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The higher the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly record to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to 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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