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Green circuit board with gold contacts and black memory chips

OWC

OWC 8GB DDR3 1333 ECC Registered RDIMM memory upgrade

SKU CH-FN3Y-82JJ0

An 8 GB DDR3 1333 ECC registered RDIMM for Lenovo System x3950 X5 servers

  • Capacity8GB
  • Type240-Pin DDR3 ECC RDIMM
  • SpeedDDR3 1333 (PC3 10600)
  • CAS LatencyCL9
  • Voltage1.5V
  • ECCYes

Capacity 8GB

  • ECC registered design protects data integrity in servers
  • 8 GB capacity adds memory headroom for virtualization
  • DDR3 1333 PC3-10600 speed matches system requirements
  • 240-pin 1.5 V RDIMM fits Lenovo x3950 X5 slots
  • Replaces 17 Lenovo part numbers for drop-in compatibility

What this memory is and who it is for

This 8GB DDR3 1333 ECC Registered RDIMM module is built for the Lenovo System x3950 X5 server. It runs at PC3-10600 speed with CL9 latency and 1.5V operation, using a 2Rx4 rank configuration on a 240-pin form factor. The part is new and replaces a long list of Lenovo service numbers for direct drop-in upgrades.

Who this suits and who should look elsewhere

It suits administrators maintaining or expanding x3950 X5 systems that require registered ECC memory. Builders of standard desktops or workstations that accept only unbuffered non-ECC DIMMs cannot use this module, and it must not be mixed with unbuffered memory in the same platform.

The specification that decides fit

The module is a 240-pin DDR3 1333 PC3-10600 CL9 2Rx4 1.5V ECC Registered RDIMM; the server must support registered ECC DDR3 at this exact speed, voltage, rank and pin count for the upgrade to function.

Puntos fuertes

  • ECC registered design protects data integrity in servers
  • 8 GB capacity adds memory headroom for virtualization
  • DDR3 1333 PC3-10600 speed matches system requirements
  • 240-pin 1.5 V RDIMM fits Lenovo x3950 X5 slots
  • Replaces 17 Lenovo part numbers for drop-in compatibility

Especificaciones

BrandOWC
Part Number1R3D32R408GB
Capacity8GB
Type240-Pin DDR3 ECC RDIMM
SpeedDDR3 1333 (PC3 10600)
CAS LatencyCL9
Voltage1.5V
ECCYes
Buffered/RegisteredRegistered
Rank2Rx4
Heat SpreaderNo
Compatible SystemLenovo System x3950 X5

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Preguntas sobre este artículo

Will the 2Rx4 rank layout require matching modules when I expand the Lenovo System x3950 X5 later?

Yes — OWC recommends using DIMMs of the same capacity, speed and manufacturer, so adding another 8 GB 2Rx4 PC3-10600 CL9 registered module keeps the memory subsystem balanced.

Does the registered buffer and ECC add latency that becomes the bottleneck during long compute runs?

The CL9 timing at DDR3 1333 sets the access latency; the registered buffer adds one cycle but prevents signal loading limits, so the CAS latency remains the first measurable boundary under sustained workloads.

How much heat does a 1.5 V DDR3 1333 RDIMM produce when the server runs 24/7 without a heat spreader?

At 1.5 V and standard JEDEC power envelopes the module runs warm but within spec; airflow across the 240-pin DIMM slots in the x3950 X5 chassis is sufficient for continuous operation.

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