Memory upgrade information:

Supports DDR3 DIMMs only
Dual channel memory architecture
Four DDR3 DIMM (240-pin) sockets
DIMM types:
PC3-10600 (DDR3-1333)
PC3-8500 (DDR3-1066)
Non-ECC memory only, unbuffered
Supports up to 16 GB on 64-bit PCs
Maximum memory only if using 4GB DDR3 DIMM modules.
NOTE:32-bit PCs can only address less than 4.0 GB of memory. This motherboard is not planned for use with a 32-bit OS.