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Radeon R9 390X 8G vs Radeon RX Vega 56

Intro

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

Compare those specifications to the Radeon RX Vega 56, which has a clock frequency of 1156 MHz and a HBM2 memory frequency of 1600 MHz. It also makes use of a 2048-bit bus, and makes use of a 14 nm design. It is made up of 3584 SPUs, 224 Texture Address Units, and 64 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 Vega 56 21011 points
Radeon R9 390X 8G 13555 points
Difference: 7456 (55%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX Vega 56 210 Watts
Radeon R9 390X 8G 275 Watts
Difference: 65 Watts (31%)

Memory Bandwidth

Performance-wise, the Radeon RX Vega 56 should in theory be just a bit superior to the Radeon R9 390X 8G in general. (explain)

Radeon RX Vega 56 419430 MB/sec
Radeon R9 390X 8G 384000 MB/sec
Difference: 35430 (9%)

Texel Rate

The Radeon RX Vega 56 should be much (more or less 40%) faster with regards to AF than the Radeon R9 390X 8G. (explain)

Radeon RX Vega 56 258944 Mtexels/sec
Radeon R9 390X 8G 184800 Mtexels/sec
Difference: 74144 (40%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon RX Vega 56 is a better choice, though only just barely. (explain)

Radeon RX Vega 56 73984 Mpixels/sec
Radeon R9 390X 8G 67200 Mpixels/sec
Difference: 6784 (10%)

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

Radeon RX Vega 56

Amazon.com

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 Vega 56
Manufacturer AMD AMD
Year June 2015 September 2017
Code Name Grenada XT Vega 10 XL
Memory 8192 MB 8192 MB
Core Speed 1050 MHz 1156 MHz
Memory Speed 6000 MHz 1600 MHz
Power (Max TDP) 275 watts 210 watts
Bandwidth 384000 MB/sec 419430 MB/sec
Texel Rate 184800 Mtexels/sec 258944 Mtexels/sec
Pixel Rate 67200 Mpixels/sec 73984 Mpixels/sec
Unified Shaders 2816 3584
Texture Mapping Units 176 224
Render Output Units 64 64
Bus Type GDDR5 HBM2
Bus Width 512-bit 2048-bit
Fab Process 28 nm 14 nm
Transistors 6200 million 12500 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 megabytes per second) that can be transferred across the external memory interface in a second. It's calculated by multiplying the bus width by the speed of its memory. In the case of DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster 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 can be applied in one second. This is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly record to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on quite a few other factors, especially 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 R9 390X 8G

Amazon.com

Radeon RX Vega 56

Amazon.com

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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