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Radeon HD 6790 vs Radeon RX 550

Intro

The Radeon HD 6790 makes use of a 40 nm design. AMD has clocked the core speed at 840 MHz. The GDDR5 RAM works at a frequency of 1050 MHz on this specific card. It features 800 SPUs as well as 40 Texture Address Units and 16 Rasterization Operator Units.

Compare all that to the Radeon RX 550, which has a core clock speed of 1100 MHz and a GDDR5 memory frequency of 1750 MHz. It also features a 128-bit memory bus, and makes use of a 14 nm design. It features 512 SPUs, 32 Texture Address Units, 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

Performance-wise, the Radeon HD 6790 should in theory be a bit better than the Radeon RX 550 overall. (explain)

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

Texel Rate

The Radeon RX 550 is just a bit (about 5%) faster with regards to AF than the Radeon HD 6790. (explain)

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

Pixel Rate

The Radeon RX 550 will be quite a bit (about 31%) more effective at full screen anti-aliasing than the Radeon HD 6790, and should be capable of handling higher resolutions without losing too much performance. (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

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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 largest amount of data (measured in megabytes per second) that can be transported past the external memory interface in a second. It's calculated by multiplying the interface width by its memory speed. In the case of DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called 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 of the card - 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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