While I think the RDNA2 cards are very impressive performance wise lets not go crazy.
They don't "wipe the floor" with Ampere, that's silly.
The 6800XT will trade blows with the 3080, game by game basis either one card or the other will "win" normally by a small number of frames or small percentage. Some will be so close it will essentially be a draw (1-3fps difference). If you turn on SAM and Rage Mode the 6800XT will generally pull ahead of the 3080 by a little, the 3080 will probably pull ahead in games with RT enabled by a little. We are not going to see night and day differences here people.
The 6900XT without SAM and RM on will likely be just a hair or so behind the 3090 in rasterization when all is said and done. Maybe like 2 or 3% behind overall? Possibly 5% at max. If you turn on SAM and RM it will generally close the distance to essentially be on par. Granted the card draws 50 watts less and costs $500 less for very close performance. If the OC headroom rumours are true then pushing up the power envelope to match 3090 should provide pretty great results.
And 6800 clearly beats 3070 with a very clear undisputed win.
Now given that these cards are cheaper, lower power draw, on a smaller chip/card and have less transistors, smaller bus, not to mention cool exclusive features like SAM and Infinity Cache, more VRAM (outside 3090) and that they are competitive in performance with Nvidia is pretty amazing.
But they are not going to demolish Nvidia or wipe the floor with the 3000 series in rasterization performance. Anyone expecting that is going to be disappointed come benchmarks day. They will be roughly on par on a game by game basis with wins and loses for each card. Depending on the titles benchmarked and how many of them there are, the 3000 series might actually pull ahead in the overall average by 1 or 2% margin potentially. Lets just wait and see final performance in real benchmarks, the impressive part is that both Nvidia and AMD are pretty much on par now in performance, which is great for everyone.
The cards reportedly do have a lot of overclocking headroom, so doing a manual OC, especially in the case of 6900XT which is against a 3090 with 50 more watts, should provide additional performance gains. I expect AIB OC models of all the 6000 series to really excel. However we have not seen "proof" of this necessarily with benchmarks/announcements from AIBs so lets not take it as confirmed fact until we get confirmation.
I think AMD seem to have done an amazing job here, especially seeing how far behind they were before and how much bigger Nvidia is as a company compared to the Radeon group inside AMD.