GeForce RTX 3090 vs Radeon RX 6800 XT

Intro

Compare those specs to the Radeon RX 6800 XT, which uses a 7 nm design. AMD has clocked the core speed at 1825 MHz. The GDDR6 RAM is set to run at a frequency of 2000 MHz on this model. It features 4608 SPUs as well as 288 Texture Address Units and 128 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 6800 XT		300 Watts
GeForce RTX 3090		350 Watts
	Difference: 50 Watts (17%)

Memory Bandwidth

As far as performance goes, the GeForce RTX 3090 should theoretically be a lot better than the Radeon RX 6800 XT in general. (explain)

GeForce RTX 3090		958668 MB/sec
Radeon RX 6800 XT		524288 MB/sec
	Difference: 434380 (83%)

Texel Rate

The Radeon RX 6800 XT is a bit (about 15%) faster with regards to AF than the GeForce RTX 3090. (explain)

Radeon RX 6800 XT		525600 Mtexels/sec
GeForce RTX 3090		457560 Mtexels/sec
	Difference: 68040 (15%)

Pixel Rate

The Radeon RX 6800 XT will be a lot (more or less 50%) more effective at anti-aliasing than the GeForce RTX 3090, and also capable of handling higher screen resolutions without slowing down too much. (explain)

Radeon RX 6800 XT		233600 Mpixels/sec
GeForce RTX 3090		156240 Mpixels/sec
	Difference: 77360 (50%)

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 information (in units of megabytes per second) that can be transported across the external memory interface within a second. It is calculated by multiplying the bus width by the speed of its memory. If it uses DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This figure is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The better the texel rate, the better the 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 number of pixels that the graphics chip could possibly write to the local memory in a 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 clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.