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 288-pin DDR4 RDIMM, 133 by 30 by 3 mm, single module

SAMSUNG

SAMSUNG M393A1G40DB0-CPB0Q 8GB PC4-2133P ECC RDIMM Server Memory memory upgrade

SKU CH-M0JN-C0QTP

8 GB DDR4 ECC registered DIMM running at 2133 MHz with CL15 latency for validated server motherboards

  • Total capacity8 GB
  • Rated speedDDR4 2133 (PC4 17000)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL15
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • ECC protection guards data integrity with built-in parity checking
  • Registered design stabilises signals through on-module registers for reliable server operation
  • DDR4 2133 speed at CL15 latency delivers responsive throughput for demanding workloads
  • 2 V operation reduces power draw and heat in dense memory configurations
  • 8 GB single-rank module fits validated Supermicro X10 platforms via 288-pin DDR4 interface

Server ECC RDIMM upgrade

This 8 GB DDR4 registered DIMM adds error-correcting capacity to compatible server platforms. It operates at 2133 MT/s with CL15 latency and a 1.20 V supply. The module uses a 1Rx4 organisation and includes on-board registers for signal integrity. It targets administrators expanding memory in validated multi-socket systems.

Replaces non-ECC or slower DDR4 modules

The jump is worthwhile when workloads demand data integrity and the motherboard qualifies registered ECC memory. Systems running unbuffered DIMMs or lower-speed PC4-17000 kits gain corrected error handling and registered signalling. Builders needing consumer SO-DIMMs, higher frequencies or non-ECC operation should look elsewhere.

Sustained load behaviour

Registered buffering stabilises command and address lines during continuous multi-threaded throughput. ECC parity detection corrects single-bit errors without halting execution. The 1.20 V rating keeps power draw predictable across full DIMM populations. Modules without registered control or ECC cannot maintain equivalent signal quality under prolonged stress.

How it compares

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

Price $49.99
Cheaper than about 78% of the 21,161 comparable items (median $397.99).
Total capacity 8 GB
Lower than about 80% 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
Product lineServer Memory
Model nameSAMSUNG:M393A1G40DB0-CPB
SAMSUNG:M393A1G40EB1-CPB
CRUCIAL:CT8G4RFS4213
HYNIX:HMA41GR7MFR4N-TF
KINGSTON:KVR21R15S4/8
Total capacity8 GB
Product type288-Pin DDR4 SDRAM
Performance
Rated speedDDR4 2133 (PC4 17000)
Processor
ChipsetMajor Brand Chipset
Memory
CAS latencyCL15
ECC supportYes
Buffer typeRegistered
Memory rank1Rx4
Power
Rated voltage1.2 V
Compatibility
Compatible systemsM393A1G40DB0-CPB

Questions about this item

Will this 288-pin DDR4 RDIMM fit in a standard server DIMM slot?

The module is 133 mm long, 30 mm high and 3 mm thick, matching the 288-pin DDR4 RDIMM form factor used in validated boards such as the MBD-X10DAC and MBD-X10DRG-H.

What is the correct way to seat this registered ECC module, and what step do installers often miss?

Align the off-centre notch with the slot key, press straight down until both side latches click, then verify the BIOS reports 2133 MT/s at CL15 and 1.20 V.

When should this 8 GB 1Rx4 module be replaced?

Replace the module if the system logs uncorrectable ECC errors, if memory diagnostics report persistent failures, or when a capacity upgrade requires higher-density DIMMs.

More in Model-Specific Memory Upgrades

Similar items