I build my new rig a few days ago (Specs in sig) and ran Memtest86 on it before I installed my OS. I have 32GB of ram total, and Windows 8.1 Pro 64bit. I've noticed that sometimes when I start my PC up from a cold boot Windows only sees 24 of my 32GB of RAM. I noticed this the other day when I opened up the task manager to check a few things. A simple reboot will fix the issue and Windows will see all 32GB again. Right now I am using XMP profile 1 on my MB. Any ideas? I shouldn't have to reboot my machine here and there just to get all of my RAM to show up.