[SOLVED] unstable/slow 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

 

[chun2maru]

did u use 4x8 kit or 2x2x8 ? if u using 2x2x8 the problem might be in the ram.

 

[vistagamer6969]

Sounds like a motherboard problem
Update the bios, maybe you get it working

 

[arrrps]

did u use 4x8 kit or 2x2x8 ? if u using 2x2x8 the problem might be in the ram.

its a 4 x16 kit for 64 gb (I do a lot of after effects work)