GeForce RTX 3080 12 GB vs Radeon R9 M390X

Intro

Compare that to the Radeon R9 M390X, which features core speeds of 723 MHz on the GPU, and 1250 MHz on the 4096 MB of GDDR5 RAM. It features 2048 SPUs as well as 128 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M390X		125 Watts
GeForce RTX 3080 12 GB		350 Watts
	Difference: 225 Watts (180%)

Memory Bandwidth

Theoretically speaking, the GeForce RTX 3080 12 GB should be 484% quicker than the Radeon R9 M390X overall, because of its greater data rate. (explain)

GeForce RTX 3080 12 GB		934298 MB/sec
Radeon R9 M390X		160000 MB/sec
	Difference: 774298 (484%)

Texel Rate

The GeForce RTX 3080 12 GB should be much (approximately 281%) faster with regards to AF than the Radeon R9 M390X. (explain)

GeForce RTX 3080 12 GB		352800 Mtexels/sec
Radeon R9 M390X		92544 Mtexels/sec
	Difference: 260256 (281%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce RTX 3080 12 GB is superior to the Radeon R9 M390X, by far. (explain)

GeForce RTX 3080 12 GB		141120 Mpixels/sec
Radeon R9 M390X		23136 Mpixels/sec
	Difference: 117984 (510%)

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 maximum amount of data (measured in megabytes per second) that can be moved over the external memory interface within a second. It is calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the better 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 applied in one second. This figure is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The better the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly record to its local memory in one second - measured in millions of pixels per second. The figure 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 drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.