GeForce RTX 3080 12 GB vs Radeon R9 M390X

Intro

Compare those specifications 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 ROPs.

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

In theory, the GeForce RTX 3080 12 GB should be a lot faster than the Radeon R9 M390X in general. (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 is much (more or less 281%) more effective at 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

The GeForce RTX 3080 12 GB will be much (about 510%) better at full screen anti-aliasing than the Radeon R9 M390X, and able to handle higher resolutions while still performing well. (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: Memory bandwidth is the max amount of information (counted in MB per second) that can be moved past the external memory interface in one second. It is worked out by multiplying the interface width by its memory speed. If the card has DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster 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 are applied per second. This is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The higher the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly write to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour 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 fill rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.