Meinrad Disalan :
theonerm2 :
The maximum RAM is 32GB. http://us.msi.com/product/mb/A68HM-E33.html#hero-specification
what ram can i install? 2xof 16gb? what brand and frequency?
The only officially supported stick of 16GB of RAM is the IMM2G64D3DUD8AG-B15E. It runs at a frequency of 1333MHz and it's very expensive and hard to find. For more information click the link.
http://www.msi.com/support/mb/A68HM-E33.html#support-mem Other memory might work but buy it at your own risk. The RAM is located here
https://squareup.com/market/MemphisElectronicRetail You would need to buy 2 of them for 32GB. It will cost you over $600 and I do not recommend buying it.
I need to ask though. Why do you want that much RAM?