Computer boots missing ram

This has been going on for weeks. I'll go to bed with 32 gigs of ram, boot up the next day and my motherboard says the ram values have changed. Now only 24 gigs show up. I restart again and the missing ram is back again.

It doesn't BSOD, doesn't crash, doesn't act the slightest bit abnormal. Still plays games at the usual fps, there's no audio screech, nothing seems out of place. Everything is up to date.

Windows 10 Pro
MSI 970A-G46
AMD 8350 Black Edition
32 gigs Kingston Hyper Xtreme 1600ddr3
Nvidia GTX 1080 FE

Just a shot in the dark: How many memory sticks? Maybe you need to reseat some of them.

I was thinking about a tear down and clean. All sticks are the exact same make model and speed.

I haven't tweaked them aside from the motherboards auto overclock genie option. I did not touch any specific settings. It's been like that untouched for a few years now. Just suddenly started happening. The tower never moves an inch or is kicked nor powered off unexpectedly.