Quanta S215 Server Series S215-X12KS S215-X22KQ. DIMM DDR3 PC3-12800 1600MHz RAM Memory 32GB KIT (4 x 8GB) at Amazon.com
ADATA Premier DDR3 1333MHz 4GB Memory Modules (AD3S1333C4G9-R) at Amazon.com
A-Tech 32GB KIT (2 x 16GB) for Asus Z Motherboard Series Z8NA-D6, Z8NA-D6C, Z8NH-D12 DIMM DDR3 ECC Registered PC3-12800 1600MHz Dual Rank Server RAM Memory at Amazon.com