Power, Temperature and Noise
The two Radeons slot in as expected when evaluated over total PC power consumption at the wall. RTX 3080 is a bit quicker but it chews through more power.
The beefier cooler on the RX 6800 XT pays decent dividends on the 300W GPU. The slimmer heatsink of the RX 6800 also has no trouble in taming temps to a respectable level.
AMD has learned lessons from previous reference boards. Not only do these look good, they perform well, too. Noise levels are not an issue in our test PC.