So, I have ordered 4 sticks of 4GB each of Corsair Vengeance LP RAM, and used it for about 3 days with no problems at all. Then today they didn't want to boot at 1600Mhz and I had to turn the frequency down to 1333. I used the pc for a couple of hours trying to find the issue and I got a BSOD. I thought it was a problem of the RAM and so I tried every stick since the system didn't boot with all four of them in their slots. Strangely enough it booted up every time with every of the four sticks. So I put them all in and it powered on with 16GB of RAM. The problem is that in the BIOS and in Windows I can see 8gigs of ram, while in CPU-Z it shows 16 of them. System specs below, I really have no idea what could be the problem.