Take it with a grain of salt but leaks posted on Twitter indicate AMD's upcoming Big Navi will be able to beat the NVIDIA GeForce RTX 3080 in 3DMark FireStrike Ultra. Patrick Schur claims the Navi 21 XT chip (aka Radeon RX 6800 XT) scores over 10,000 points in this test and CapFrameX claims one Big Navi variant scores 11,500 points in FireStrike Ultra. This makes Big Navi about 8 percent faster than the RTX 3080.
Of course, we can't verify the accuracy until more trustworthy results start hitting the web. Furthermore, 3DMark FireStrike Ultra is a pretty old DirectX 11 test, it was first released in 2014.
The 3070 has only 8,749 points in FireStrike Ultra? Goodbye 3070! The Navi 21 XT has more than 10,000 points. ????