DDR2-400 R-DIMM is designed to improve performance in dedicated servers and workstations, DDR2-400 Registered DIMM offers unparalleled stability and synchronized clock accuracy. Transcend understands the long-term investment value that quality computer systems and components represent to businesses, which is why our DDR ECC modules are manufactured using only the highest-quality components available, and undergo the same stringent performance, compatibility, and stress tests as our newest models.