Hello there ! Yes, the numbers I see when I copy files are close to SEQ1M Q1T1. Your explanation makes sense.
Let’s call that “growing pains”. As usual with this type of motherboard, there’s a learning curve and some effort required to get the most out of it. I’m not giving up. I’m digging deep into the BIOS and looking at PCIe redriver settings. I’m not the only one having issues with PCIe 4.0 on this board, using risers, in fact someone just created an account and started a thread with that specific problem !
Help with WRX80E-Sage SE Render server
I’m going to post my research on this topic in their thread, I feel it’s something a few Asus users will be interested in.
EDIT : it’s been a few evenings of research and experimentation and the result is that my 3090 now works in PCIe 4.0 all the way to the end of the motherboard and riser. A lot went into getting this result, you may want to check it out as I’ve added a lot of background info that could help you no matter what platform you’re having PCIe trouble with. END OF EDIT
That being said, even in its incomplete state (still missing its actual RAM) this machine is very promising.