GeForce RTX 3090 vs Radeon RX 6800

Intro

Compare all 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 uses a 256-bit memory bus, and makes use of a 7 nm design. It is comprised of 3840 SPUs, 240 TAUs, 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

Theoretically, the GeForce RTX 3090 should perform a lot faster than the Radeon RX 6800 in general. (explain)

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

Texel Rate

The GeForce RTX 3090 should be a little bit (more or less 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

The Radeon RX 6800 should be a small bit (about 4%) more effective at full screen anti-aliasing than the GeForce RTX 3090, and should be capable of handling higher screen resolutions while still performing well. (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: Bandwidth is the maximum amount of information (in units of MB per second) that can be moved over the external memory interface in a second. It is calculated by multiplying the card's bus width by the speed of its memory. If it uses DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, 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 number of texture map elements (texels) that can be applied per second. This number is worked out by multiplying the total 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 processed in one second.

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