GeForce RTX 4080 vs Radeon RX 7900 XT

Intro

Compare all that to the Radeon RX 7900 XT, which features GPU core speed of 1500 MHz, and 20480 MB of GDDR6 memory running at 2500 MHz through a 320-bit bus. It also is made up of 5376 SPUs, 336 TAUs, and 192 Raster Operation Units.

Display Graphs

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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

Theoretically speaking, 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 is a lot (approximately 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 will be a little bit (approximately 17%) better at FSAA than the GeForce RTX 4080, and also should be able to handle higher resolutions without slowing down too much. (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: Bandwidth is the max amount of data (counted in MB per second) that can be transported across the external memory interface within a second. The number is worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better 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 figure is worked out by multiplying the total amount of texture units by the core speed of the chip. The better this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.