This motherboard supports both ECC (KVR266X72C25/xxx) and non-ECC (KVR266X64C25/xxx) memory. ECC and non-ECC modules can be mixed, but the ECC function will not be performed.
This system only supports 4 banks of memory. If two double sided DIMMs are used, the 3rd socket is disabled.
Bank Schema
Config / Kingston Part Number / Qty (Upgrade Path)