Let be honest, 4090s will retain MOST of their value even after 5090s are released. I don't imagine loosing too much money unless your paying 2000+ for it (which is just silly)
ESXI 5.1
ASRock Z77 EXTREME4-M
Intel I7-3770
Samsung 840 Pro 250GB
Intel Pro 1000/Dual Port NIC (EXPI9402PT)
Ripjaws X Series 32GB RAM
Everything works including vt-d. Waiting for my m1015 card to come in so I can experiment with Freenas.
Only thing that sucks is that ESX won't...