GeForce RTX 3080 vs Radeon RX 6800

Intro

Compare those specs 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 features 3840 SPUs, 240 TAUs, and 96 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 6800		250 Watts
GeForce RTX 3080		320 Watts
	Difference: 70 Watts (28%)

Memory Bandwidth

In theory, the GeForce RTX 3080 is 48% faster than the Radeon RX 6800 overall, because of its greater data rate. (explain)

GeForce RTX 3080		778547 MB/sec
Radeon RX 6800		524288 MB/sec
	Difference: 254259 (48%)

Texel Rate

The Radeon RX 6800 should be just a bit (approximately 4%) more effective at anisotropic filtering than the GeForce RTX 3080. (explain)

Radeon RX 6800		408000 Mtexels/sec
GeForce RTX 3080		391680 Mtexels/sec
	Difference: 16320 (4%)

Pixel Rate

The Radeon RX 6800 should be just a bit (about 18%) more effective at FSAA than the GeForce RTX 3080, and able to handle higher screen resolutions more effectively. (explain)

Radeon RX 6800		163200 Mpixels/sec
GeForce RTX 3080		138240 Mpixels/sec
	Difference: 24960 (18%)

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 (measured in megabytes per second) that can be transported across the external memory interface in a second. The number is calculated by multiplying the card's interface width by its memory speed. If it uses DDR RAM, it must 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, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs 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 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 maximum fill rate.