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Radeon HD 6790 vs Radeon RX 550

Intro

The Radeon HD 6790 has clock speeds of 840 MHz on the GPU, and 1050 MHz on the 1024 MB of GDDR5 memory. It features 800 SPUs as well as 40 Texture Address Units and 16 ROPs.

Compare those specifications to the Radeon RX 550, which features a clock speed of 1100 MHz and a GDDR5 memory frequency of 1750 MHz. It also makes use of a 128-bit bus, and makes use of a 14 nm design. It is made up of 512 SPUs, 32 TAUs, and 16 ROPs.

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Radeon RX 550 3507 points
Radeon HD 6790 2150 points
Difference: 1357 (63%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 550 50 Watts
Radeon HD 6790 150 Watts
Difference: 100 Watts (200%)

Memory Bandwidth

In theory, the Radeon HD 6790 should perform a small bit faster than the Radeon RX 550 in general. (explain)

Radeon HD 6790 134400 MB/sec
Radeon RX 550 114688 MB/sec
Difference: 19712 (17%)

Texel Rate

The Radeon RX 550 should be just a bit (more or less 5%) more effective at anisotropic filtering than the Radeon HD 6790. (explain)

Radeon RX 550 35200 Mtexels/sec
Radeon HD 6790 33600 Mtexels/sec
Difference: 1600 (5%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon RX 550 is the winner, and very much so. (explain)

Radeon RX 550 17600 Mpixels/sec
Radeon HD 6790 13440 Mpixels/sec
Difference: 4160 (31%)

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 6790

Amazon.com

Check prices at:

Radeon RX 550

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 6790 Radeon RX 550
Manufacturer AMD AMD
Year April 2011 April 2017
Code Name Barts LE Polaris 12
Memory 1024 MB 2048 MB
Core Speed 840 MHz 1100 MHz
Memory Speed 4200 MHz 7000 MHz
Power (Max TDP) 150 watts 50 watts
Bandwidth 134400 MB/sec 114688 MB/sec
Texel Rate 33600 Mtexels/sec 35200 Mtexels/sec
Pixel Rate 13440 Mpixels/sec 17600 Mpixels/sec
Unified Shaders 800 512
Texture Mapping Units 40 32
Render Output Units 16 16
Bus Type GDDR5 GDDR5
Bus Width 256-bit 128-bit
Fab Process 40 nm 14 nm
Transistors 1700 million 2200 million
Bus PCIe 2.1 x16 PCIe 3.0 x16
DirectX Version DirectX 11 DirectX 12.0
OpenGL Version OpenGL 4.1 OpenGL 4.5

Memory Bandwidth: Bandwidth is the maximum amount of information (in units of MB per second) that can be transferred over the external memory interface in a second. It's worked out by multiplying the card's bus width by the speed of its memory. If it uses DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends 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

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Radeon HD 6790

Amazon.com

Check prices at:

Radeon RX 550

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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