GeForce RTX 3080 12 GB vs Radeon RX 7900 XTX

Intro

Compare those specifications to the Radeon RX 7900 XTX, which has core speeds of 1855 MHz on the GPU, and 2500 MHz on the 24576 MB of GDDR6 RAM. It features 6144 SPUs as well as 384 Texture Address Units 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

In theory, the Radeon RX 7900 XTX should be 5% faster than the GeForce RTX 3080 12 GB in general, due to its higher bandwidth. (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 much (more or less 102%) more effective 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 will be much (approximately 152%) better at full screen anti-aliasing than the GeForce RTX 3080 12 GB, and able to handle higher resolutions while still performing well. (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: Bandwidth is the maximum amount of data (in units of MB per second) that can be moved across the external memory interface in a second. It is worked out by multiplying the card's interface width by the speed of its memory. If it uses DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.