Memory technology
The workstation dual in-line memory modules (DIMMs) are based on DDR3 1333MHz technology, and are error checking and correcting (ECC)-protected. Three direct attach memory channels enable low latency accesses and fast data transfer for improved performance. System memory sizes up to 16GB (using 4GB DIMMs) are supported.
http://jp.ext.hp.com/lib/doc/manual/workstation/hp_workstation/504630_001.pdf