GeForce RTX 3080 12 GB vs Radeon RX 7900 XTX

Intro

Compare all of that to the Radeon RX 7900 XTX, which uses a 5 nm design. AMD has set the core frequency at 1855 MHz. The GDDR6 RAM works at a speed of 2500 MHz on this particular model. It features 6144 SPUs along with 384 TAUs and 192 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce RTX 3080 12 GB		350 Watts
Radeon RX 7900 XTX		355 Watts
	Difference: 5 Watts (1%)

Memory Bandwidth

Theoretically speaking, the Radeon RX 7900 XTX should be 5% faster than the GeForce RTX 3080 12 GB in general, due to its greater data rate. (explain)

Radeon RX 7900 XTX		983040 MB/sec
GeForce RTX 3080 12 GB		934298 MB/sec
	Difference: 48742 (5%)

Texel Rate

The Radeon RX 7900 XTX is a lot (about 102%) better at AF than the GeForce RTX 3080 12 GB. (explain)

Radeon RX 7900 XTX		712320 Mtexels/sec
GeForce RTX 3080 12 GB		352800 Mtexels/sec
	Difference: 359520 (102%)

Pixel Rate

The Radeon RX 7900 XTX should be quite a bit (more or less 152%) more effective at anti-aliasing than the GeForce RTX 3080 12 GB, and should be able to handle higher screen resolutions without losing too much performance. (explain)

Radeon RX 7900 XTX		356160 Mpixels/sec
GeForce RTX 3080 12 GB		141120 Mpixels/sec
	Difference: 215040 (152%)

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 largest amount of data (in units of megabytes per second) that can be moved across the external memory interface within a second. It's worked out by multiplying the interface width by its memory clock speed. In the case of DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's 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 amount of texture map elements (texels) that can be applied in one second. This figure is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The better this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.