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Radeon R9 390X 8G vs Radeon RX Vega 56

Intro

The Radeon R9 390X 8G comes with core speeds of 1050 MHz on the GPU, and 1500 MHz on the 8192 MB of GDDR5 RAM. It features 2816 SPUs as well as 176 TAUs and 64 Rasterization Operator Units.

Compare those specifications to the Radeon RX Vega 56, which has a clock frequency of 1156 MHz and a HBM2 memory speed of 1600 MHz. It also features a 2048-bit bus, and uses a 14 nm design. It is comprised of 3584 SPUs, 224 Texture Address Units, and 64 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 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

Theoretically speaking, the Radeon RX Vega 56 should be 9% quicker than the Radeon R9 390X 8G in general, because of its higher bandwidth. (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 is quite a bit (approximately 40%) faster with regards to texture filtering 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

The Radeon RX Vega 56 will be just a bit (about 10%) faster with regards to anti-aliasing than the Radeon R9 390X 8G, and will be capable of handling higher screen resolutions better. (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

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Radeon RX Vega 56

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 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 max amount of information (measured in MB per second) that can be transported across the external memory interface in a second. It's worked out by multiplying the interface width by its memory clock speed. If it uses DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This is calculated by multiplying the total number of texture units by the core speed of the chip. The higher the texel rate, the better the video 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 the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

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Radeon R9 390X 8G

Amazon.com

Check prices at:

Radeon RX Vega 56

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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