Computer Memory Solutions CM20487212800ECCR2R4H 32GB (2x16GB) DDR3 1600MHz ECC Registered DIMM memory upgrade

Compatible HP Z620 memory upgrade

This 32GB kit contains two 16GB DDR3 registered ECC DIMMs built for the HP Compaq Workstation Z620. Each module runs at 1600MHz with CL11 timing at 1.5V. The 2Rx4 organisation and registered buffer suit the workstation's quad-channel architecture. Buyers who need unbuffered ECC or non-ECC memory for other platforms cannot use this kit.

240-pin registered DIMM build

The modules use a standard 240-pin DDR3 form factor without a heat spreader. Registered signalling reduces electrical load on the memory controller when all twelve DIMM sockets are populated. Mixing these registered DIMMs with unbuffered ECC modules is not supported by the Z620, so a full upgrade must use matching registered parts. Systems that require low-profile modules or passive cooling clearance should verify fit before purchase.

DDR3 1600MHz speed limit

The Z620 platform supports 1066MHz, 1333MHz, 1600MHz and 1866MHz speeds depending on the installed processor. This kit operates at the 1600MHz (PC3-12800) rate; 1866MHz operation requires E5-2600 v2 or E5-1600 v2 series processors, which are not referenced in the kit specifications. Maximum registered ECC capacity is 192GB across twelve sockets, so this 32GB kit leaves room for further expansion.