GeForce RTX 3090 vs Radeon RX 6800

Intro

Compare all of that to the Radeon RX 6800, which features a core clock frequency of 1700 MHz and a GDDR6 memory frequency of 2000 MHz. It also features a 256-bit memory bus, and makes use of a 7 nm design. It is comprised of 3840 SPUs, 240 Texture Address Units, and 96 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 6800		250 Watts
GeForce RTX 3090		350 Watts
	Difference: 100 Watts (40%)

Memory Bandwidth

In theory, the GeForce RTX 3090 is 83% quicker than the Radeon RX 6800 overall, due to its higher bandwidth. (explain)

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

Texel Rate

The GeForce RTX 3090 should be just a bit (approximately 12%) faster with regards to AF than the Radeon RX 6800. (explain)

GeForce RTX 3090		457560 Mtexels/sec
Radeon RX 6800		408000 Mtexels/sec
	Difference: 49560 (12%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon RX 6800 is superior to the GeForce RTX 3090, but it probably won't make a huge difference. (explain)

Radeon RX 6800		163200 Mpixels/sec
GeForce RTX 3090		156240 Mpixels/sec
	Difference: 6960 (4%)

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 maximum amount of information (counted in megabytes per second) that can be moved across the external memory interface in one second. The number is calculated by multiplying the card's interface width by the speed of its memory. If the card has DDR RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This number is calculated by multiplying the total number of texture units by the core clock speed of the chip. The better the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.