GeForce RTX 3080 vs Radeon RX 6900 XT

Intro

Compare that to the Radeon RX 6900 XT, which makes use of a 7 nm design. AMD has set the core speed at 1825 MHz. The GDDR6 RAM works at a frequency of 2000 MHz on this model. It features 5120 SPUs along with 320 TAUs and 128 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 6900 XT		300 Watts
GeForce RTX 3080		320 Watts
	Difference: 20 Watts (7%)

Memory Bandwidth

Theoretically speaking, the GeForce RTX 3080 should perform quite a bit faster than the Radeon RX 6900 XT overall. (explain)

GeForce RTX 3080		778547 MB/sec
Radeon RX 6900 XT		524288 MB/sec
	Difference: 254259 (48%)

Texel Rate

The Radeon RX 6900 XT will be much (about 49%) more effective at anisotropic filtering than the GeForce RTX 3080. (explain)

Radeon RX 6900 XT		584000 Mtexels/sec
GeForce RTX 3080		391680 Mtexels/sec
	Difference: 192320 (49%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon RX 6900 XT is superior to the GeForce RTX 3080, and very much so. (explain)

Radeon RX 6900 XT		233600 Mpixels/sec
GeForce RTX 3080		138240 Mpixels/sec
	Difference: 95360 (69%)

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 (measured in MB per second) that can be moved across the external memory interface in a second. It is worked out by multiplying the card's bus width by the speed of its memory. If the card has DDR memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one second. This number is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher this number, the better the video 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 number of pixels the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.