GeForce RTX 4080 vs Radeon RX 7900 XTX

Intro

Compare those specifications to the Radeon RX 7900 XTX, which uses a 5 nm design. AMD has set the core frequency at 1855 MHz. The GDDR6 RAM runs at a speed of 2500 MHz on this card. It features 6144 SPUs as well as 384 TAUs and 192 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce RTX 4080		320 Watts
Radeon RX 7900 XTX		355 Watts
	Difference: 35 Watts (11%)

Memory Bandwidth

Theoretically speaking, the Radeon RX 7900 XTX is 34% quicker than the GeForce RTX 4080 in general, because of its higher data rate. (explain)

Radeon RX 7900 XTX		983040 MB/sec
GeForce RTX 4080		734003 MB/sec
	Difference: 249037 (34%)

Texel Rate

The Radeon RX 7900 XTX will be a small bit (about 6%) more effective at texture filtering than the GeForce RTX 4080. (explain)

Radeon RX 7900 XTX		712320 Mtexels/sec
GeForce RTX 4080		670320 Mtexels/sec
	Difference: 42000 (6%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon RX 7900 XTX is a better choice, by a large margin. (explain)

Radeon RX 7900 XTX		356160 Mpixels/sec
GeForce RTX 4080		246960 Mpixels/sec
	Difference: 109200 (44%)

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 moved past the external memory interface within a second. It is worked out by multiplying the card's bus width by its memory clock speed. If the card has DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This number is calculated 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 in one second.

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