GeForce RTX 3080 Ti vs Radeon R9 M390X

Intro

Compare all that to the Radeon R9 M390X, which comes with clock speeds of 723 MHz on the GPU, and 1250 MHz on the 4096 MB of GDDR5 memory. It features 2048 SPUs along with 128 Texture Address Units and 32 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

As far as performance goes, the GeForce RTX 3080 Ti should in theory be much better than the Radeon R9 M390X in general. (explain)

GeForce RTX 3080 Ti		934297 MB/sec
Radeon R9 M390X		160000 MB/sec
	Difference: 774297 (484%)

Texel Rate

The GeForce RTX 3080 Ti should be a lot (approximately 372%) better at texture filtering than the Radeon R9 M390X. (explain)

GeForce RTX 3080 Ti		436800 Mtexels/sec
Radeon R9 M390X		92544 Mtexels/sec
	Difference: 344256 (372%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce RTX 3080 Ti is the winner, and very much so. (explain)

GeForce RTX 3080 Ti		152880 Mpixels/sec
Radeon R9 M390X		23136 Mpixels/sec
	Difference: 129744 (561%)

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 data (in units of MB per second) that can be transferred over the external memory interface in a second. It's worked out by multiplying the bus width by its memory speed. If the card has DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This is worked out by multiplying the total amount of 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 in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.