Radeon R9 390X 8G vs Radeon RX Vega 56

Intro

Compare those specs to the Radeon RX Vega 56, which has a GPU core clock speed of 1156 MHz, and 8192 MB of HBM2 memory running at 1600 MHz through a 2048-bit bus. It also is comprised of 3584 Stream Processors, 224 Texture Address Units, and 64 Raster Operation Units.

Display Graphs

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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

In theory, the Radeon RX Vega 56 should be 9% quicker than the Radeon R9 390X 8G overall, due to its higher data rate. (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 much (approximately 40%) more effective at anisotropic 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

If running with high levels of AA is important to you, then the Radeon RX Vega 56 is a better choice, but only just. (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

Specifications

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

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This is calculated by multiplying the total texture units by the core clock speed of the chip. The higher the texel rate, 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 number of pixels that the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.