Radeon R9 M390X vs Radeon RX Vega 56

Intro

Compare those specs to the Radeon RX Vega 56, which comes with a core clock speed 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 made up of 3584 SPUs, 224 TAUs, and 64 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M390X		125 Watts
Radeon RX Vega 56		210 Watts
	Difference: 85 Watts (68%)

Memory Bandwidth

The Radeon RX Vega 56 should in theory be much faster than the Radeon R9 M390X overall. (explain)

Radeon RX Vega 56		419430 MB/sec
Radeon R9 M390X		160000 MB/sec
	Difference: 259430 (162%)

Texel Rate

The Radeon RX Vega 56 will be quite a bit (more or less 180%) better at anisotropic filtering than the Radeon R9 M390X. (explain)

Radeon RX Vega 56		258944 Mtexels/sec
Radeon R9 M390X		92544 Mtexels/sec
	Difference: 166400 (180%)

Pixel Rate

The Radeon RX Vega 56 is quite a bit (approximately 220%) more effective at AA than the Radeon R9 M390X, and should be able to handle higher screen resolutions while still performing well. (explain)

Radeon RX Vega 56		73984 Mpixels/sec
Radeon R9 M390X		23136 Mpixels/sec
	Difference: 50848 (220%)

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 (in units of megabytes per second) that can be transferred across the external memory interface in one second. It's calculated by multiplying the card's bus width by its memory speed. If it uses DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better 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 amount of texture map elements (texels) that are processed per second. This figure is worked out by multiplying the total texture units by the core clock speed of the chip. The better this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.