GeForce RTX 3090 vs Radeon RX 6800

Intro

Compare all of that to the Radeon RX 6800, which features GPU clock speed of 1700 MHz, and 16384 MB of GDDR6 RAM running at 2000 MHz through a 256-bit bus. It also is made up of 3840 SPUs, 240 Texture Address Units, and 96 ROPs.

Display Graphs

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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

The GeForce RTX 3090 should in theory be 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 bit (approximately 12%) faster with regards to anisotropic filtering 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 high levels of AA is important to you, then the Radeon RX 6800 is a better choice, 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 largest amount of data (measured in MB per second) that can be transported past the external memory interface in a second. It's worked out by multiplying the interface width by the speed of its memory. In the case of DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher 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 number of texture map elements (texels) that are processed in one second. This is worked out by multiplying the total texture units by the core speed of the chip. The higher the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.