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Four green DDR3 ECC registered DIMMs with gold contacts

OWC

OWC 32GB (4x8GB) DDR3 1600 ECC Registered RDIMM HP Z620

SKU CH-3GGS-XR57W

32GB kit of four 8GB DDR3 1600 ECC registered RDIMMs for HP Z620 workstations

  • Capacity32GB (4 x 8GB)
  • Type240-Pin DDR3 ECC RDIMM
  • SpeedDDR3 1600 (PC3 12800)
  • CAS LatencyCL11
  • Voltage1.5V
  • ECCYes

Capacity 32GB (4 x 8GB)

  • ECC registered design protects data integrity in workstations
  • 32 GB kit (4 × 8 GB) expands Z620 memory capacity
  • DDR3 1600 CL11 matches factory speed specification
  • 5 V operation meets original voltage requirement
  • Replaces HP part numbers 647651081, 647651181, 647879B21, 647899B21, 647899B212, 664691001, 676333B21, 676490181, 676812001, 687462001

OWC 32GB DDR3 ECC Registered Kit

This 32 GB kit contains four 8 GB DDR3 1600 modules built to PC3-12800 CL11 timings. They are 240-pin registered DIMMs with ECC and a 1Rx4 organisation, designed specifically for the HP Workstation Z620.

DDR3 1600 Registered ECC Limits

The DDR3 1600 registered ECC standard tops out at 1600 MT/s and requires a platform that supports registered signalling and error correction. Standard desktop boards cannot use these modules and they must not be mixed with unbuffered DIMMs.

Installing In The HP Z620

Shut down the workstation, open the chassis and populate the approved memory slots following the Z620 service guide. The most common issue is mixing registered and unbuffered DIMMs, which prevents the system from posting.

Highlights

  • ECC registered design protects data integrity in workstations
  • 32 GB kit (4 × 8 GB) expands Z620 memory capacity
  • DDR3 1600 CL11 matches factory speed specification
  • 5 V operation meets original voltage requirement
  • Replaces HP part numbers 647651081, 647651181, 647879B21, 647899B21, 647899B212, 664691001, 676333B21, 676490181, 676812001, 687462001

Specifications

BrandOWC
Part Number1R6D31R4032S
Capacity32GB (4 x 8GB)
Type240-Pin DDR3 ECC RDIMM
SpeedDDR3 1600 (PC3 12800)
CAS LatencyCL11
Voltage1.5V
ECCYes
Buffered/RegisteredRegistered
Rank1Rx4
Heat SpreaderNo
Compatible SystemHP Workstation Z620

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Questions about this item

Should I choose this 32 GB kit or a smaller capacity for my HP Z620?

This kit provides 32 GB across four 8 GB modules, filling four slots on the Z620. If the workstation has eight slots you can add another identical kit later for 64 GB total.

What does the 1600 MHz rating mean once the modules are installed in the Z620?

The memory runs at DDR3 1600 (PC3-12800) with CL11 latency at 1.5 V, delivering the rated throughput the Z620 memory controller supports.

Is the 240-pin registered ECC interface compatible with standard desktop motherboards?

No. These are 240-pin DDR3 ECC registered DIMMs (1Rx4) designed for workstation and server platforms; they will not work in unbuffered desktop boards.

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