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Green circuit board with gold edge connectors and black memory chips

OWC

OWC 8GB DDR3L 1600 CL11 240-pin 1.35V ECC Registered RDIMM memory upgrade

SKU CH-S31Q-H4JBK

An 8 GB DDR3L ECC registered DIMM running at 1600 MHz CL11 for HP ProLiant Gen8 servers

  • Capacity8GB
  • Type240-Pin DDR3L ECC RDIMM
  • SpeedDDR3L 1600 (PC3L 12800)
  • CAS LatencyCL11
  • Voltage1.35V
  • ECCYes

Capacity 8GB

  • ECC registered design protects data integrity in server workloads
  • DDR3L 1600 CL11 at 1.35 V reduces power draw versus standard DDR3
  • Single 8 GB 1Rx4 module fits one 240-pin slot for simple capacity expansion
  • Validated for HP ProLiant DL380e Gen8 DL560 Gen8 SL4540 Gen8 systems
  • Replaces HP part numbers 731765B21 731765B211 735302001 for drop-in compatibility

Server-grade DDR3L ECC RDIMM

This 8 GB DDR3L 1600 module uses ECC registered technology for HP ProLiant DL380e Gen8, DL560 Gen8 and SL4540 Gen8 servers. It operates at 1.35 V with CL11 latency and a 1Rx4 rank layout. The 240-pin form factor fits the listed systems only and will not work in standard desktop computers.

Sustained operation with error correction

ECC circuitry detects and corrects single-bit errors during continuous workloads, helping maintain data integrity in virtualisation or database tasks. Registered buffering reduces electrical load on the memory controller when multiple modules are populated. The low-voltage DDR3L design limits heat output under extended use.

Direct installation in validated slots

Align the notch with the 240-pin DIMM socket and press until the latches engage; no heat spreader clearance issues arise. Mixing this registered module with unbuffered memory will prevent the system from booting. Verify the exact HP part numbers 731765B21, 731765B211 or 735302001 before ordering.

Highlights

  • ECC registered design protects data integrity in server workloads
  • DDR3L 1600 CL11 at 1.35 V reduces power draw versus standard DDR3
  • Single 8 GB 1Rx4 module fits one 240-pin slot for simple capacity expansion
  • Validated for HP ProLiant DL380e Gen8 DL560 Gen8 SL4540 Gen8 systems
  • Replaces HP part numbers 731765B21 731765B211 735302001 for drop-in compatibility

Specifications

BrandOWC
Part Number1R6T31R408GB
Capacity8GB
Type240-Pin DDR3L ECC RDIMM
SpeedDDR3L 1600 (PC3L 12800)
CAS LatencyCL11
Voltage1.35V
ECCYes
Buffered/RegisteredRegistered
Rank1Rx4
Heat SpreaderNo
Compatible SystemHP ProLiant DL380e Gen8
HP ProLiant DL560 Gen8
HP ProLiant SL4540 Gen8

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Questions about this item

How much heat and power does the 1.35 V DDR3L 1600 RDIMM draw when the server runs 24/7?

At 1.35 V the DDR3L module uses less power and generates less heat than standard 1.5 V DDR3, helping the ProLiant chassis stay cooler during continuous operation.

What must the HP ProLiant already have for this 240-pin ECC Registered DIMM to work?

The server needs a DDR3L-capable memory controller, free 240-pin RDIMM slots, and a BIOS that accepts 1Rx4 ECC Registered modules at PC3L-12800 speed.

Can I mix this 8 GB 1Rx4 Registered stick with the unbuffered DIMMs still in my Gen8?

No — the manufacturer highlights state that ECC Registered memory cannot be mixed with unbuffered memory, so all slots must use registered modules.

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