Windows 10: msi z270-a pro only works with two ram memories

Hi, the msi z270-a pro motherboard only works with two ram memory cards when I add one or two more and it won't boot anymore. Now I am using with two 8gb modules and I have two 4gb modules unused because of this problem. The cpu pins are fine, the cables are also well installed on the motherboard. So I don't know what the problem is that the pc only starts with two ram memories. I also tried the ram slots and they all work. I cleaned the slots with a fine brush and also cleaned the ram slots with an eraser but nothing, it does not work. Also when I changed the motherboard I did a clean Windows 10 installation. I attach a Windows image where you can see that it does not recognize neither the processor nor the installed ram and the second image is the most curious one which is something connected to the M.2 but I do not know what it is, that component connected to the m2 already came with the motherboard I bought.
Well I hope you can help me to solve this problem.
Thank you very much in advance.
Best regards.









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Issues with total memory size of dedicated available RAM

Hello Gevorg,

Thank you for posting your concern in Microsoft Community an we regret for the inconvenience.

From the description provided, I understand that the motherboard you are using has 4 DIMM slots which supports up to 8 GB of dedicated RAM.

To be able to understand the issue better. let us know how are you viewing the total memory size of dedicated available RAM in your PC.

Now, in one case, if you are using more than one module of RAM, and the frequencies at which they operate are not the same. There will be two outcomes:

• The modules will conflict in terms of DIMM frequencies and it will declare memory failure.
• Instead of downclocking one or more RAM/s, the motherboard will reject the ones from being accepted.

In order to ascertain if the hardware is correctly configured, I suggest you to check the system information in the BIOS settings. Refer to the manufacturer provided manual to know more about on how to access the BIOS settings.

In another scenario, your computer may also be allocating part of your RAM to other hardware modules, such as your network hardware.

As a secondary workout, I suggest you to increase the Virtual Memory and check if it helps. Follow the steps below.

• 
  Click Windows key + R to open the RUN command utility and type
  msconfig.exe, then press ENTER.
  
• 
  Click on Boot option and select advanced options.
  
• 
  Check the maximum memory box and change the value accordingly.
  
• 
  Click on Apply and Ok to save changes and click Restart the computer.
  

Hope the above information is helpful.

Thank You.