GeForce RTX 2080 Ti vs Radeon R9 M390X

Intro

Compare those specifications to the Radeon R9 M390X, which has GPU clock speed of 723 MHz, and 4096 MB of GDDR5 RAM set to run at 1250 MHz through a 256-bit bus. It also features 2048 Stream Processors, 128 TAUs, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M390X		125 Watts
GeForce RTX 2080 Ti		250 Watts
	Difference: 125 Watts (100%)

Memory Bandwidth

Theoretically speaking, the GeForce RTX 2080 Ti should perform quite a bit faster than the Radeon R9 M390X overall. (explain)

GeForce RTX 2080 Ti		630784 MB/sec
Radeon R9 M390X		160000 MB/sec
	Difference: 470784 (294%)

Texel Rate

The GeForce RTX 2080 Ti is much (more or less 297%) faster with regards to anisotropic filtering than the Radeon R9 M390X. (explain)

GeForce RTX 2080 Ti		367200 Mtexels/sec
Radeon R9 M390X		92544 Mtexels/sec
	Difference: 274656 (297%)

Pixel Rate

The GeForce RTX 2080 Ti will be a lot (approximately 413%) faster with regards to AA than the Radeon R9 M390X, and should be capable of handling higher resolutions better. (explain)

GeForce RTX 2080 Ti		118800 Mpixels/sec
Radeon R9 M390X		23136 Mpixels/sec
	Difference: 95664 (413%)

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: Bandwidth is the max amount of information (in units of megabytes per second) that can be transported past the external memory interface within a second. It's calculated by multiplying the interface width by its memory clock speed. In the case of DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, HDR 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 card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the most pixels the graphics card 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 ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.