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Four green 240-pin DDR3 RDIMM modules in static bags

OWC

OWC 128GB (4x32GB) DDR3 1600 CL11 ECC Registered RDIMM server RAM

SKU CH-WCTK-F64ZB

128 GB kit of four 32 GB DDR3 1600 CL11 ECC registered RDIMMs for servers and workstations

  • Total capacity128 GB (4 × 32 GB)
  • Rated speedDDR3 1600 (PC3 12800)
  • CAS latencyCL11
  • Rated voltage1.5 V
  • Buffer typeRegistered
  • Memory rank4Rx4

Capacity 128GB (4 x 32GB)

Rank 4Rx4

  • ECC registered design protects data integrity in servers
  • 128 GB total capacity across four 32 GB modules
  • DDR3 1600 speed with CL11 latency for responsive performance
  • JEDEC and RoHS compliant for warranty-safe upgrades
  • 240-pin 1.5 V RDIMM form factor fits select workstations and servers

Server memory for workstations and NAS

This 128GB kit contains four 32GB DDR3 1600 ECC Registered RDIMM modules built for select workstations, servers, NAS systems and routers. It is not compatible with standard desktop computers and cannot be mixed with unbuffered memory.

Registered ECC with 4Rx4 organisation

The modules run at PC3-12800 speed with CL11 latency at 1.5V and use a 240-pin DDR3 form factor. The registered buffer and 4Rx4 rank layout are the single specification that decides whether this kit will work in a given platform.

Tool-free DIMM installation

Each module seats in a standard 240-pin DDR3 slot without a heat spreader to obstruct adjacent slots. The usual failure is installing the kit in a consumer motherboard that only accepts unbuffered non-ECC memory, which prevents the system from posting.

How it compares

Measured against everything we stock in ECC Server RAM, at today’s prices. Recalculated every night.

Price $314.99
Pricier than about 61% of the 6,523 comparable items (median $188.99).
Total capacity 128 GB (4 × 32 GB)
Higher than about 90% of the 6,064 comparable items (median 32 GB).
Price per GB $2.46 per GB
Cheaper than about 92% of the 6,064 comparable items (median $7.25 per GB).

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Specifications

Product
Brand nameOWC
Part number1R6D34R4128S
Total capacity128 GB (4 × 32 GB)
Product type240-Pin DDR3 ECC RDIMM
Performance
Rated speedDDR3 1600 (PC3 12800)
Memory
CAS latencyCL11
ECC supportYes
Buffer typeRegistered
Memory rank4Rx4
Kit configurationDual Channel Kit
Heat spreaderNo
Power
Rated voltage1.5 V

Other versions of this model

5 more in the same range

Questions about this item

What does the PC3-12800 1600 CL11 rating mean once the kit is installed in a server?

The kit runs at 1600 MT/s with CAS latency 11 at 1.5 V, delivering the standard DDR3-1600 data rate for registered ECC workloads.

How does the 240-pin registered DDR3 interface limit what this memory can do in practice?

Registered DDR3 240-pin modules only fit workstation and server boards that support ECC RDIMMs; they will not work in standard desktop DDR3 slots.

What physical clearance and slot layout does the 4-module kit require?

Four 240-pin RDIMMs occupy four adjacent DDR3 slots; ensure the motherboard has enough unobstructed slots and that CPU coolers do not overhang the DIMM sockets.

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