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Green rectangular circuit board with gold edge connectors and black memory chips on both sides

OWC

OWC 128GB DDR4 2933MHz CL21 1.2V 288pin ECC Registered RDIMM memory upgrade

SKU CH-3AAK-XPCBT

128 GB DDR4 ECC registered DIMM running at 2933 MHz CL21 for compatible Supermicro server motherboards

  • Capacity128GB
  • Type288-Pin DDR4 ECC RDIMM
  • SpeedDDR4 2933 (PC4 23400)
  • CAS LatencyCL21
  • Voltage1.2V
  • ECCYes

Capacity 128GB

  • 128GB capacity for demanding server workloads
  • ECC registered design detects and corrects data errors
  • 2933MHz DDR4 speed with CL21 latency
  • 2V low-voltage operation reduces power draw
  • Validated for Supermicro X11DAC, X11DAi-N, X11DDW-L, X11DDW-NT, X11DGO-T

ECC Registered Server Memory

This 128GB DDR4 module is built for Supermicro X11DAC, X11DAi-N, X11DDW-L, X11DDW-NT and X11DGO-T motherboards. It targets administrators upgrading workstations, servers or NAS systems that require registered ECC memory. Standard desktop platforms cannot use this module and it must not be mixed with unbuffered DIMMs.

Thermals and Power Draw

Operating at 1.2V, the module runs at standard DDR4 voltage without a heat spreader. Registered buffering reduces electrical load on the memory controller during sustained server workloads. JEDEC-compliant design ensures stable thermals inside typical chassis airflow. Power consumption scales with the 2933MHz operating speed under normal use.

Build Integration

The 288-pin RDIMM fits directly into compatible Supermicro X11 slots and replaces Supermicro part numbers MEMDR412LSL01ER29 and MEM-DR412MH-ER29. Backward compatibility with 2133MHz, 2400MHz and 2666MHz buses allows deployment in mixed-speed configurations. Four-rank 4Rx4 organisation maximises capacity per slot, freeing remaining DIMM positions for future expansion.

Privalumai

  • 128GB capacity for demanding server workloads
  • ECC registered design detects and corrects data errors
  • 2933MHz DDR4 speed with CL21 latency
  • 2V low-voltage operation reduces power draw
  • Validated for Supermicro X11DAC, X11DAi-N, X11DDW-L, X11DDW-NT, X11DGO-T

Specifikacijos

BrandOWC
Part Number2R9D44R4128G
Capacity128GB
Type288-Pin DDR4 ECC RDIMM
SpeedDDR4 2933 (PC4 23400)
CAS LatencyCL21
Voltage1.2V
ECCYes
Buffered/RegisteredRegistered
Rank4Rx4
Heat SpreaderNo
Compatible SystemSupermicro Motherboard X11DAC
Supermicro Motherboard X11DAi-N
Supermicro Motherboard X11DDW-L
Supermicro Motherboard X11DDW-NT
Supermicro Motherboard X11DGO-T

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How do I install the 288-pin DDR4 ECC RDIMM in a Supermicro X11DAC, and what step is often missed?

Power down the server, open the chassis, align the notch on the 288-pin module with the slot key, press firmly until both retention clips click, then verify in BIOS that the 128GB module registers at 2933MHz CL21; the step often missed is confirming the registered ECC mode is enabled in BIOS.

What maintenance or replacement will the 128GB DDR4 2933MHz CL21 1.2V module need over its service life?

No scheduled maintenance is required; keep server air filters clean so the module stays within its 1.2V operating envelope, and replace only if memory diagnostics report uncorrectable ECC errors or the system fails to POST with the 4Rx4 registered DIMM installed.

What limit appears first when the 4Rx4 registered DIMM runs sustained workloads on a Supermicro X11DDW-L?

The memory controller’s maximum supported frequency of 2933MHz is the first ceiling; sustained loads will not exceed the rated PC4-23400 bandwidth, and the module will down-clock to 2666MHz, 2400MHz or 2133MHz if the platform cannot maintain 2933MHz.

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