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Radeon R9 390X 8G vs Radeon RX 550

Intro

The Radeon R9 390X 8G features clock speeds of 1050 MHz on the GPU, and 1500 MHz on the 8192 MB of GDDR5 RAM. It features 2816 SPUs along with 176 Texture Address Units and 64 ROPs.

Compare those specs to the Radeon RX 550, which has GPU clock speed of 1100 MHz, and 2048 MB of GDDR5 memory set to run at 1750 MHz through a 128-bit bus. It also is made up of 512 SPUs, 32 Texture Address Units, and 16 Raster Operation 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

In theory, the Radeon R9 390X 8G is 235% faster than the Radeon RX 550 in general, due to its greater data rate. (explain)

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

Texel Rate

The Radeon R9 390X 8G should be quite a bit (more or less 425%) faster with regards to AF than the Radeon RX 550. (explain)

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

Pixel Rate

The Radeon R9 390X 8G is a lot (more or less 282%) faster with regards to AA than the Radeon RX 550, and will be able to handle higher screen resolutions while still performing well. (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

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 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: Memory bandwidth is the maximum amount of information (in units of megabytes per second) that can be transported past the external memory interface in one second. It is worked out by multiplying the card's interface width by the speed of its memory. In the case of DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also 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, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum 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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