You can run 1 - 8GB memory module in each.
2 x 1.5V DDR3 DIMM sockets supporting up to 16 GB of system memory
* Due to Windows 32-bit operating system limitation, when more than 4 GB of physical memory is installed, the actual memory size displayed will be less than 4 GB.
Dual channel memory architecture
Support for DDR3 2200(OC)/1333/1066/800 MHz memory modules
Support for non-ECC memory modules