GeForce RTX 4080 vs Radeon RX 7900 XT

Intro

Compare all of that to the Radeon RX 7900 XT, which has GPU clock speed of 1500 MHz, and 20480 MB of GDDR6 RAM set to run at 2500 MHz through a 320-bit bus. It also is comprised of 5376 SPUs, 336 Texture Address Units, and 192 Raster Operation 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 should perform a small bit faster than the GeForce RTX 4080 in general. (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 a lot (more or less 33%) faster with regards to 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

The Radeon RX 7900 XT is a little bit (more or less 17%) faster with regards to anti-aliasing than the GeForce RTX 4080, and also should be able to handle higher resolutions more effectively. (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 maximum amount of information (counted in megabytes per second) that can be transferred over the external memory interface in a second. It is worked out by multiplying the card's bus width by its memory speed. In the case of DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.