GeForce RTX 4080 vs Radeon RX 6950 XT

Intro

Compare those specifications to the Radeon RX 6950 XT, which features GPU clock speed of 1925 MHz, and 16384 MB of GDDR6 memory running at 2250 MHz through a 256-bit bus. It also is comprised of 5120 SPUs, 320 Texture Address Units, and 128 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce RTX 4080		320 Watts
Radeon RX 6950 XT		335 Watts
	Difference: 15 Watts (5%)

Memory Bandwidth

As far as performance goes, the GeForce RTX 4080 should theoretically be a lot better than the Radeon RX 6950 XT overall. (explain)

GeForce RTX 4080		734003 MB/sec
Radeon RX 6950 XT		589824 MB/sec
	Difference: 144179 (24%)

Texel Rate

The GeForce RTX 4080 will be a little bit (about 9%) more effective at AF than the Radeon RX 6950 XT. (explain)

GeForce RTX 4080		670320 Mtexels/sec
Radeon RX 6950 XT		616000 Mtexels/sec
	Difference: 54320 (9%)

Pixel Rate

The GeForce RTX 4080 will be a bit (about 0%) more effective at AA than the Radeon RX 6950 XT, and also capable of handling higher resolutions better. (explain)

GeForce RTX 4080		246960 Mpixels/sec
Radeon RX 6950 XT		246400 Mpixels/sec
	Difference: 560 (0%)

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 largest amount of data (in units of MB per second) that can be moved over the external memory interface in a second. The number is worked out by multiplying the card's interface width by its memory clock speed. If the card has DDR type memory, it must 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, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This figure is worked out by multiplying the total texture units by the core clock 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 applied per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly record to its local memory in one second - measured in millions of pixels per second. The number is calculated 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 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.