GeForce RTX 4080 vs Radeon RX 7900 XT

Intro

Compare all of that to the Radeon RX 7900 XT, which features core clock speeds of 1500 MHz on the GPU, and 2500 MHz on the 20480 MB of GDDR6 memory. It features 5376 SPUs along with 336 Texture Address Units and 192 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 7900 XT		300 Watts
GeForce RTX 4080		320 Watts
	Difference: 20 Watts (7%)

Memory Bandwidth

In theory, the Radeon RX 7900 XT is 12% quicker than the GeForce RTX 4080 in general, due to its higher bandwidth. (explain)

Radeon RX 7900 XT		819200 MB/sec
GeForce RTX 4080		734003 MB/sec
	Difference: 85197 (12%)

Texel Rate

The GeForce RTX 4080 should be quite a bit (more or less 33%) more effective at anisotropic filtering than the Radeon RX 7900 XT. (explain)

GeForce RTX 4080		670320 Mtexels/sec
Radeon RX 7900 XT		504000 Mtexels/sec
	Difference: 166320 (33%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon RX 7900 XT is the winner, but only just. (explain)

Radeon RX 7900 XT		288000 Mpixels/sec
GeForce RTX 4080		246960 Mpixels/sec
	Difference: 41040 (17%)

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 (measured in megabytes per second) that can be transferred over the external memory interface within a second. The number is calculated by multiplying the interface 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 better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed in one second. This figure is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The higher this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

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