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Radeon R9 390 8G vs Radeon RX 550

Intro

The Radeon R9 390 8G has a core clock frequency of 1000 MHz and a GDDR5 memory speed of 1500 MHz. It also uses a 512-bit bus, and makes use of a 28 nm design. It is comprised of 2560 SPUs, 160 Texture Address Units, and 64 Raster Operation Units.

Compare those specifications to the Radeon RX 550, which has a core clock frequency 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 features 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 390 8G 12733 points
Radeon RX 550 3507 points
Difference: 9226 (263%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

Theoretically, the Radeon R9 390 8G should be a lot faster than the Radeon RX 550 overall. (explain)

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

Texel Rate

The Radeon R9 390 8G will be quite a bit (more or less 355%) more effective at anisotropic filtering than the Radeon RX 550. (explain)

Radeon R9 390 8G 160000 Mtexels/sec
Radeon RX 550 35200 Mtexels/sec
Difference: 124800 (355%)

Pixel Rate

The Radeon R9 390 8G will be quite a bit (more or less 264%) better at anti-aliasing than the Radeon RX 550, and also will be capable of handling higher screen resolutions while still performing well. (explain)

Radeon R9 390 8G 64000 Mpixels/sec
Radeon RX 550 17600 Mpixels/sec
Difference: 46400 (264%)

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 390 8G

Amazon.com

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Radeon RX 550

Amazon.com

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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 390 8G Radeon RX 550
Manufacturer AMD AMD
Year June 2015 April 2017
Code Name Grenada PRO Polaris 12
Memory 8192 MB 2048 MB
Core Speed 1000 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 160000 Mtexels/sec 35200 Mtexels/sec
Pixel Rate 64000 Mpixels/sec 17600 Mpixels/sec
Unified Shaders 2560 512
Texture Mapping Units 160 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 maximum amount of data (counted in megabytes per second) that can be transferred past the external memory interface in a second. It is calculated by multiplying the card's bus width by the speed of its memory. If the card has DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines 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 fill rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

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Radeon R9 390 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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