6 x DIMM, Max. 24 GB, DDR3 2000(O.C.)/1800(O.C.)/1600(O.C.)/1333/1066 Non-ECC,Un-buffered Memory Triple channel memory architecture * Supports Intel® Extreme Memory Profile (XMP) **Due to Intel spec definition, DIMMs of DDR3-1333 or above are out of spec. Please refer to www.asus.com or user manual for the Memory QVL(Qualified Vendors List).