Thanks for this info, very interesting! I also have a i-9 10900 & RTX 3090, and a Varjo Aero.
I got lucky with an TUF4090 OC on release day, but it’s not installed yet. I read that there are problems with the Aero/4090 combo (heavy stutters, screen tearing).
Varjo is hard at work to produce a fix. So, any day now.,… fingers x-ed!!!
Will report on results!