I'd highly follow what others are saying about NOT using BIOS 3703. There are issues as people have said, as Asus has said, etc.
I myself had issues with the system stuttering during tasks such as downloads, or while gaming. There wasn't any FPS drop, just mouse movement/game/sound with up to a 5 second stutter. I tried double checking my overclock and that didn't change anything. 3504 did NOT have these stuttering issues, nor did any of the other previous BIOS's.
I actually did a BIOS flashback to 3201 and played the few games I've been playing and getting stuttering, and there is 0 stuttering. It's fixed. I saw this in another thread that someone reverted back to a previous BIOS and experienced no more stuttering.
In fact, since one of the 3XXX BIOS's, I started getting audio de-sync in some youtube or window programs while playing a video. That's why I chose to revert to more of a previous BIOS than the 3504, so I'm just trouble shooting a little further for my audio issue.
Stay away from 3703. Look up what's being said about it by consumers and companies.
I don't get why this isn't tested by Asus and why they'd release it. Maybe I'm missing something but the engineering I do involves testing prior. Doesn't make it perfect, I know, but if it's a bigger issue, then it should be worked on or not released.
Z790 Asus Hero Maximus on 0816 BIOS (0914 crashes for me), Intel 13900k stock clock, Asus 4090 Strix OC edition, FF3D532G720 Teamgroup Ram running XMP I, 16gb x 2, Samsung 980 Pro 2TB x 2, Seasonic VERTEX GX 1200W, Win 11 Pro 64, Deepcool LS720 AIO, NZXT H7 Flow. Comfortably using Armoury Crate for updates/fan xpert.