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Four green DDR3 RDIMM modules in static bags

OWC

OWC 64GB (4x16GB) DDR3 1333 ECC Registered RDIMM for Lenovo x3550 M3 x3620 M3 x3630 M3 x3650 M3 memory upgrade

SKU CH-9TSA-02FD7

64GB kit of four 16GB DDR3 1333 ECC registered RDIMMs for Lenovo System x3550 M3, x3620 M3, x3630 M3, x3650 M3 and x3850 X5 servers

  • Total capacity64 GB (4 × 16 GB)
  • Rated speedDDR3 1333 (PC3 10600)
  • CAS latencyCL9
  • Rated voltage1.5 V
  • Buffer typeRegistered
  • Memory rank2Rx4

Capacity 64GB (4 x 16GB)

  • ECC registered design protects data integrity on supported Lenovo servers
  • 64 GB total capacity delivered as four 16 GB DDR3 modules
  • DDR3 1333 MHz speed matches PC3-10600 spec for listed x3550 M3, x3620 M3, x3630 M3, x3650 M3, x3850 X5
  • 240-pin RDIMM form factor fits the validated Lenovo part numbers 03X3813 and 0A89413
  • 5 V CL9 2Rx4 configuration meets JEDEC and RoHS compliance standards

Server memory upgrade

This 64GB kit contains four 16GB DDR3 1333 registered ECC modules built for Lenovo System x3550 M3 x3620 M3 x3630 M3 x3650 M3 and x3850 X5 servers. The 240-pin RDIMMs run at 1.5V with CL9 latency and 2Rx4 organisation. They replace Lenovo part numbers 03X3813 and 0A89413.

Sustained workload behaviour

ECC registered design corrects single-bit errors and buffers address and command signals so the memory controller stays stable during long compute runs. The modules are JEDEC and RoHS compliant and tested in-house for multi-hour operation without throttling.

Registered ECC requirement

This kit only works in systems that require registered ECC DDR3 RDIMMs; it will not function in desktops or workstations that take unbuffered non-ECC memory and it cannot be mixed with unbuffered modules.

How it compares

Measured against everything we stock in Model-Specific Memory Upgrades, at today’s prices. Recalculated every night.

Price $179.99
Cheaper than about 59% of the 21,161 comparable items (median $397.99).
Total capacity 64 GB (4 × 16 GB)
Higher than about 60% of the 20,941 comparable items (median 32 GB).
Price per GB $2.81 per GB
Cheaper than about 91% of the 20,941 comparable items (median $8.19 per GB).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameOWC
Part number1R3D32R4064S
Total capacity64 GB (4 × 16 GB)
Product type240-Pin DDR3 ECC RDIMM
Performance
Rated speedDDR3 1333 (PC3 10600)
Memory
CAS latencyCL9
ECC supportYes
Buffer typeRegistered
Memory rank2Rx4
Heat spreaderNo
Power
Rated voltage1.5 V
Compatibility
Compatible systemsLenovo System x3550 M3
Lenovo System x3620 M3
Lenovo System x3630 M3
Lenovo System x3650 M3
Lenovo System x3850 X5

Other versions of this model

5 more in the same range

Questions about this item

How much power does the 1.5V DDR3 1333 kit draw when the server runs continuously?

Each module operates at 1.5V; total consumption depends on the server's memory controller and workload, not on the kit alone.

What must the Lenovo System x3550 M3 already have to accept these 240-pin RDIMMs?

The server must support DDR3 ECC Registered memory and provide 240-pin DIMM slots; unbuffered DIMMs cannot be mixed with this kit.

Can I keep the existing 03X3813 modules and add this 64GB kit alongside them?

All DIMMs should match in capacity, speed and manufacturer for optimal performance; mixing different modules is not recommended.

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