I got them on a 690 Hero after a fresh installation of Win 11 Pro. I know it's a different motherboard, but you might get an idea from the following:
I installed all of the Win 11 drivers manually and couldn't understand why I was getting 2-3 WHEA 17 errors every second.
After a couple of days, I did another fresh install and let Arnoury Crate install the drivers - all was good after that. Then I just updated drivers where newer ones were available. Don't know if one of my manually installed drivers got corrupted, but maybe this information might help?
Here's another clue, I later discovered that an external NVME drive had got corrupted (and would have been corrupted when I got those errors). It worked, but was reporting the wrong amount of used space (disk properties vs checking folder sizes manually) and was running at slow file transfer speeds. I still got the WHEA errors even when it wasn't plugged in so maybe not, but you could check your drives for errors as well. You never know...
I can't say if those events were linked or not, but since the reinstall using Armoury Crate and reformatting the external drive, I haven't had another WHEA 17 error since. I suppose it's possible (but probably unlikely) that the external drive corrupted a file in Windows somehow.
PS I couldn't track down the exact source of the errors either, but like yours, they were related to the PCI bus.
Z690 Hero, BIOS 3401, MEI 2345.5.3.0, ME Firmware 16.1.30.2361, 7000X Case, RM1000x PSU, i9 12900K, ASUS TUF OC 3090TI, 2 x 16GB Corsair RAM @ 5200MHz, Windows 11 Pro 23H2, Corsair H150i Elite AIO, 4x Corsair RGB fans, 3x M.2 NVME drives, 2x SATA SSDs, 2x SATA HDs.