Recently bought a new 7800X3D along with 16x2 6000mhz Cl30-40-40 sticks paired with MSI B650 tomahawk. Never got it to work smoothly at all. Black screens from bios, from boot, inside windows, during games. System never stabilized even without expo or with -20 PBO or default settings.
Turns out my new liquid cooler factory thermal paste patch wasn’t up to it. Temps never went above 85 degrees anyway, but as soon as I re applied fresh thick coat of thermal paste all my issues were gone and I started getting 18400 multicore scores in Cinebench R23.
Seems these CPU’s heat spreaders are absolute dog. I came across lots of people trying completely different things for this same issue. Thought I’d post this here since these CPU’s don’t come with cooling and many will be using brand new coolers on them.