need help with unstable/slox 3950X

[arrrps]

I have noticed that my machine has been running very sluggish in recent weeks and noticed in that in the BIOS my xmp profile for 3600 keep disappearing and I have to reset it. Then today it wouldn’t restart and i had a “15” post code so I reseeded my RAM but I still couldn’t get my XMP to stick. I then played around by mixing and matching the sticks in different dims slots, reseeded the 3950X and eventually i got it to both boot and keep the ram at 3600. I then ran cinebench and noticed my score was 1000 points less than I normally get. Restarted and saw the XMP went away again. Eventually i got it to stick again and ran cinebench and again i had the low score. So i ran my standard 4.3 ghz 1.3 v overclock that runs totally stable normally while edit or run cinebench (i would get scored 500-600 more than normal, but i normally dont keep it there) and now it crashes the machine when i run it. I have no idea whats going on so any help here would be very much appreciated.

3950x
Noctua NHU 12A
X570 Taichi
4x16 gskill ripjaws v red 3600
MSI Ventus OC RTX 2060 super

[jmarket]

You are seeking help on at least 4 forums which through conflicting advice, bought about due to unknown changes due to help elsewhere, can lead to confusion and possible damage to your machine. Please decide where you would like to receive advice and give the others the courtesy of letting them know you no longer require help.