GeForce RTX 3080 12 GB vs Radeon RX 7900 XT

Intro

Compare all that to the Radeon RX 7900 XT, which has a clock speed of 1500 MHz and a GDDR6 memory speed of 2500 MHz. It also features a 320-bit bus, and makes use of a 5 nm design. It features 5376 SPUs, 336 TAUs, and 192 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 7900 XT		300 Watts
GeForce RTX 3080 12 GB		350 Watts
	Difference: 50 Watts (17%)

Memory Bandwidth

The GeForce RTX 3080 12 GB should theoretically perform a bit faster than the Radeon RX 7900 XT overall. (explain)

GeForce RTX 3080 12 GB		934298 MB/sec
Radeon RX 7900 XT		819200 MB/sec
	Difference: 115098 (14%)

Texel Rate

The Radeon RX 7900 XT is a lot (about 43%) faster with regards to AF than the GeForce RTX 3080 12 GB. (explain)

Radeon RX 7900 XT		504000 Mtexels/sec
GeForce RTX 3080 12 GB		352800 Mtexels/sec
	Difference: 151200 (43%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon RX 7900 XT is superior to the GeForce RTX 3080 12 GB, by far. (explain)

Radeon RX 7900 XT		288000 Mpixels/sec
GeForce RTX 3080 12 GB		141120 Mpixels/sec
	Difference: 146880 (104%)

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 (in units of MB per second) that can be transported past the external memory interface in a second. The number is calculated by multiplying the card's interface width by its memory clock speed. In the case of DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better 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 per second. This is calculated by multiplying the total texture units by the core speed of the chip. The better the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the the core 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 is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.