Mine are 4x 32GB. But even with only two, it's still very unstable at 5600. I use them at 4800, otherwise it would show blue screen sooner than later. Ridiculous. I've never had more unstable computer in my life before.
ROG STRIX Z790-E GAMING WIFI
Intel Core i9-14900K
G.Skill F5-5600J3636D32GX2-RS5K
Samsung 980 Pro 2TB
The RAM can never get stable at 5600! Haven't tried with BIOS 1801 yet though.