RAM not fully detected

[Dfxx]

Hi,

 

Specs:
Intel i7 5820k
Asus x99 deluxe
16Gb Gskill DDR4 2400Mhz
AMD R7 270
XFX 750W XXX

 

Windows 8.1 Pro x64

 

 

I finished building my new desktop a few days ago. At first I had some problems as the computer would automatically restart with Blue screen.

I ran memtest86 and the first time I got and error in the test. I swapped the sticks place and made sure everything was clean. This solved the problem.

Yesterday, it was only recognizing 12Gb of RAM or 3 sticks. The A1 socket was not recognized.

Today I turned on the pc again and it was only recognizing 8Gb. The A1 and C1 were not recognized.

 

CPU-Z and Asus AI Suite can both detect the 4 RAM sticks inserted in the socket but neither the BIOS nor Windows can detect them.

 

I tried changing the sticks place. Used only one at a time and all of them were working fine. I also updated the BIOS to the lastest option (0904) and even tried to clear CMOS on the board.

 

I have no more ideas. I also uploaded so screenshots. If anyone can help me I'll be very gratefull.

[drigenx]

I have the same issue. problem solved? how?