Hey guys I’m new. Well lets start with my question. My motherboard supports a full 32 GB of RAM, but I started small with 4 GB. I then decided to upgrade to 16 GB, and after a few bad runs with bad memory modules, I finally got a set of 4 4 GB sticks of RAM that is compatible with my motherboard. I installed the RAM and it worked beautifully all 16 GB showed up on Windows 7 Pro 64bit. Then one day maybe two weeks later, I noticed the Windows 7 was reporting 16 GB (12 GB usable). I ran a memory diagnostic and the memory checked out ok, so its as I said before, where’d my memory go? Any suggestions would be appreciated. Thanks.