We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Green circuit board with black memory chips on both sides and gold edge connectors

SAMSUNG

SAMSUNG M391B5273DH0-CH9 4GB DDR3 1333 ECC Unbuffered 240-Pin memory upgrade

SKU CH-07ZP-ZNDHP MPN M391B5273DH0-CH9

4GB DDR3 1333 ECC unbuffered module with CL9 latency and 1.50V operation

  • Total capacity4 GB
  • Rated speedDDR3 1333
  • ChipsetMajor Brand Chipset
  • CAS latencyCL9
  • Rated voltage1.5 V
  • Buffer typeUnbuffered
  • ECC protection guards data integrity with DDR3 1333
  • 4 GB capacity adds responsive multitasking headroom
  • CL9 latency at 1.50 V keeps timing tight
  • Unbuffered 240-pin design fits standard DDR3 slots
  • 2Rx8 rank layout doubles chip density per module

Samsung 4GB DDR3 1333 ECC Unbuffered DIMM

This Samsung M391B5273DH0-CH9 module provides 4GB of DDR3 1333 system specific memory. It operates at 1.50V with a CAS Latency of CL9 and uses a 240-pin form factor. The stick features ECC error correction and an unbuffered design for compatible server or workstation platforms.

Suited for DDR3 servers needing ECC integrity

This module fits systems that require 240-pin DDR3 SDRAM with ECC unbuffered operation at 1333 MT/s. It is not for platforms limited to non-ECC memory or those requiring registered DIMMs. Builders needing higher density per slot or a different voltage should verify their hardware specifications first.

240-pin DDR3 1333 ECC unbuffered interface

The decisive specification is the 240-pin DDR3 1333 ECC unbuffered interface. Only motherboards supporting this exact combination of pin count, generation, speed and error correction will accept the module. Confirm the memory controller and slot type before purchase.

How it compares

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

Price $24.99
Cheaper than about 88% of the 21,161 comparable items (median $397.99).
Total capacity 4 GB
Lower than about 90% of the 20,941 comparable items (median 32 GB).
Price per GB $6.25 per GB
Cheaper than about 63% 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 nameSAMSUNG
Model nameM391B5273DH0-CH9
Total capacity4 GB
Product type240-Pin DDR3 SDRAM
Performance
Rated speedDDR3 1333
Processor
ChipsetMajor Brand Chipset
Memory
CAS latencyCL9
ECC supportYes
Buffer typeUnbuffered
Memory rank2Rx8
Power
Rated voltage1.5 V

Questions about this item

How do I install this 240-Pin DDR3 module and which step is often missed?

Align the notch on the module with the key in the 240-Pin DDR3 slot, press firmly until both retention clips click into place, and verify the system recognises the full 4GB capacity at DDR3 1333 speed.

What maintenance or replacement will this memory need over time?

No scheduled maintenance is required for this DDR3 ECC Unbuffered module; replacement is only necessary if a memory test reports correctable errors that exceed the ECC correction capability.

What limit appears first when this module runs under sustained load?

The 1.50V operating voltage and CL9 latency define the thermal and timing envelope; sustained loads are constrained by the DDR3 1333 data rate and the 2Rx8 rank organisation.

More in Model-Specific Memory Upgrades

Similar items