GeForce RTX 3080 12 GB vs Radeon R9 280X

Intro

Compare those specs to the Radeon R9 280X, which makes use of a 28 nm design. AMD has set the core speed at 850 MHz. The GDDR5 RAM runs at a frequency of 1500 MHz on this specific card. It features 2048 SPUs along with 128 TAUs and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 280X		250 Watts
GeForce RTX 3080 12 GB		350 Watts
	Difference: 100 Watts (40%)

Memory Bandwidth

In theory, the GeForce RTX 3080 12 GB should be 224% quicker than the Radeon R9 280X overall, due to its greater data rate. (explain)

GeForce RTX 3080 12 GB		934298 MB/sec
Radeon R9 280X		288000 MB/sec
	Difference: 646298 (224%)

Texel Rate

The GeForce RTX 3080 12 GB is much (about 224%) better at texture filtering than the Radeon R9 280X. (explain)

GeForce RTX 3080 12 GB		352800 Mtexels/sec
Radeon R9 280X		108800 Mtexels/sec
	Difference: 244000 (224%)

Pixel Rate

The GeForce RTX 3080 12 GB will be a lot (more or less 419%) faster with regards to AA than the Radeon R9 280X, and will be able to handle higher screen resolutions more effectively. (explain)

GeForce RTX 3080 12 GB		141120 Mpixels/sec
Radeon R9 280X		27200 Mpixels/sec
	Difference: 113920 (419%)

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 data (measured in MB per second) that can be moved over the external memory interface in one second. It is worked out by multiplying the card's bus width by its memory speed. If the card has DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This is worked out by multiplying the total number of texture units by the core clock speed of the chip. The better this number, the better the video card will be at 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 that the graphics chip can possibly record to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - aka 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 reach the max fill rate.