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Radeon R9 390X 8G vs Radeon RX 550

Intro

The Radeon R9 390X 8G features a core clock speed of 1050 MHz and a GDDR5 memory frequency of 1500 MHz. It also uses a 512-bit memory bus, and uses a 28 nm design. It is made up of 2816 SPUs, 176 Texture Address Units, and 64 Raster Operation Units.

Compare that to the Radeon RX 550, which uses a 14 nm design. AMD has set the core frequency at 1100 MHz. The GDDR5 memory is set to run at a frequency of 1750 MHz on this specific model. It features 512 SPUs along with 32 Texture Address Units and 16 Rasterization Operator Units.

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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 R9 390X 8G 13555 points
Radeon RX 550 3507 points
Difference: 10048 (287%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 550 50 Watts
Radeon R9 390X 8G 275 Watts
Difference: 225 Watts (450%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 390X 8G will be 235% faster than the Radeon RX 550 in general, because of its higher bandwidth. (explain)

Radeon R9 390X 8G 384000 MB/sec
Radeon RX 550 114688 MB/sec
Difference: 269312 (235%)

Texel Rate

The Radeon R9 390X 8G will be much (approximately 425%) better at texture filtering than the Radeon RX 550. (explain)

Radeon R9 390X 8G 184800 Mtexels/sec
Radeon RX 550 35200 Mtexels/sec
Difference: 149600 (425%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon R9 390X 8G is superior to the Radeon RX 550, by far. (explain)

Radeon R9 390X 8G 67200 Mpixels/sec
Radeon RX 550 17600 Mpixels/sec
Difference: 49600 (282%)

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 R9 390X 8G

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 R9 390X 8G Radeon RX 550
Manufacturer AMD AMD
Year June 2015 April 2017
Code Name Grenada XT Polaris 12
Memory 8192 MB 2048 MB
Core Speed 1050 MHz 1100 MHz
Memory Speed 6000 MHz 7000 MHz
Power (Max TDP) 275 watts 50 watts
Bandwidth 384000 MB/sec 114688 MB/sec
Texel Rate 184800 Mtexels/sec 35200 Mtexels/sec
Pixel Rate 67200 Mpixels/sec 17600 Mpixels/sec
Unified Shaders 2816 512
Texture Mapping Units 176 32
Render Output Units 64 16
Bus Type GDDR5 GDDR5
Bus Width 512-bit 128-bit
Fab Process 28 nm 14 nm
Transistors 6200 million 2200 million
Bus PCIe 3.0 ×16 PCIe 3.0 x16
DirectX Version DirectX 12.0 DirectX 12.0
OpenGL Version OpenGL 4.5 OpenGL 4.5

Memory Bandwidth: Bandwidth is the largest amount of information (measured in MB per second) that can be transported across the external memory interface in a second. It's calculated by multiplying the card's interface width by the speed of its memory. If it uses DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This number is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The higher this number, the better the 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 maximum amount of pixels the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs 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 fill rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

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Radeon R9 390X 8G

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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