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Green PCB DIMM with black chips and gold 240-pin edge

IBM Refurbished

IBM 49Y1565 16GB DDR3 1333 ECC Registered 1.35V 240-pin server RAM

SKU CH-C02Z-RTW9X MPN 49Y1565

16GB DDR3 ECC registered DIMM running at 1333 MHz with 1.35V low-voltage operation for compatible IBM System x servers

  • Total capacity16 GB
  • Rated speedDDR3 1333 (PC3 10600)
  • CAS latencyCL9
  • Rated voltage1.35 V
  • Buffer typeRegistered
  • Product type240-Pin DDR3 SDRAM
  • 16 GB DDR3 capacity for high-density server workloads
  • 35 V low-voltage operation reduces power draw
  • ECC registered design protects data integrity
  • 1333 MHz CL9 speed matches PC3-10600 standard
  • Compatible with IBM System X3550 M3 and X3650 M3 servers

What this module is

The IBM 49Y1565 is a 16GB DDR3 SDRAM DIMM built for System x servers. It runs at 1333 MHz with CL9 latency and a low 1.35V operating voltage. ECC and registered signal processing provide the data integrity required in enterprise environments.

Who it suits and who it does not

This module fits administrators upgrading or repairing IBM System x3550 M3 7944 and x3650 M3 7945 servers that accept 240-pin registered DIMMs. Buyers needing a different pin count, unbuffered memory or a non-ECC configuration cannot use this part.

Deciding specification

The registered ECC design combined with 1.35V DDR3 1333 operation determines compatibility; only systems qualified for this exact electrical and signalling profile will accept the module.

How it compares

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

Price $49.99
Cheaper than about 84% of the 6,523 comparable items (median $188.99).
Total capacity 16 GB
Lower than about 60% of the 6,064 comparable items (median 32 GB).
Price per GB $3.12 per GB
Cheaper than about 88% of the 6,064 comparable items (median $7.25 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 nameIBM
Model name49Y1565
Total capacity16 GB
Product type240-Pin DDR3 SDRAM
Performance
Rated speedDDR3 1333 (PC3 10600)
Memory
CAS latencyCL9
ECC supportYes
Buffer typeRegistered
Power
Rated voltage1.35 V
Size & build
Shipping weight0.23 kg
Package size178 × 51 × 13 mm

Questions about this item

How much heat does the 16 GB 1.35 V DDR3 registered DIMM add when the server runs continuously?

The module operates at 1.35 volts, which is lower than standard 1.5 V DDR3, so it contributes less heat per gigabyte during sustained workloads.

What must the system provide to use this 240-pin DDR3 ECC registered module?

A server motherboard with 240-pin DDR3 slots that support registered ECC memory and can supply 1.35 V at 1333 MHz.

Will the 1333 MHz CL9 stick work in an IBM System X3550 M3 7944 or X3650 M3 7945 alongside existing memory?

The module is listed as compatible with those systems; it will run at the speed and voltage supported by the platform and the other installed DIMMs.

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