RAM and RAM slots
ssh into a node
By the looks of this they can support LOTS of RAM:
[root@node4 ~]# dmidecode -t 16
[root@node3 ~]# dmidecode -t memory | grep -i size
Size: No Module Installed Size: 16384 MB Size: No Module Installed Size: 16384 MB Size: No Module Installed Size: 16384 MB Size: No Module Installed Size: 16384 MB Size: No Module Installed Size: 16384 MB Size: No Module Installed Size: 16384 MB Size: No Module Installed Size: 16384 MB Size: No Module Installed Size: 16384 MB
[root@node4 ~]# dmidecode -t memory | grep -i size
Size: No Module Installed Size: 16384 MB Size: No Module Installed Size: 16384 MB Size: No Module Installed Size: 16384 MB Size: No Module Installed Size: 16384 MB Size: No Module Installed Size: 16384 MB Size: No Module Installed Size: 16384 MB Size: No Module Installed Size: 16384 MB Size: No Module Installed Size: 16384 MB