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Green rectangular DDR4 LRDIMM circuit board with gold edge contacts and black memory chips, no heat spreader

OWC

OWC 128GB DDR4 2933 PC4-23400 CL21 8Rx4 288-pin 1.2V ECC LRDIMM memory upgrade

SKU CH-J2AC-3B6VQ

Single 128GB DDR4 2933 ECC load-reduced DIMM for Supermicro X11SPD-F servers

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

Capacity 128GB

  • 128 GB capacity in a single module for dense server memory
  • ECC load-reduced design improves data integrity under heavy workloads
  • DDR4 2933 MHz CL21 at 1.2 V for efficient high-speed operation
  • 8Rx4 288-pin LRDIMM built for Supermicro X11SPD-F compatibility
  • JEDEC and RoHS compliant with backward support to 2133/2400/2666 MHz

Server-grade DDR4 LRDIMM upgrade

This single 128GB DDR4 2933 module is an ECC Load Reduced DIMM built for the Supermicro X11SPD-F motherboard. It targets administrators upgrading workstations, servers or NAS systems that require registered, error-correcting memory. The 288-pin form factor and 1.2V operation match the platform's native specification. Desktop boards cannot use this module.

LRDIMM platform constraints

Load Reduced memory cannot be mixed with unbuffered or standard registered ECC DIMMs on the same motherboard. The X11SPD-F memory controller must support the LRDIMM protocol and 8Rx4 organisation for the module to initialise. Backward compatibility allows operation at 2133, 2400 or 2666 MT/s if the BIOS negotiates a lower speed. Systems lacking LRDIMM support will not post with this part installed.

128GB single-module capacity

One 128GB 8Rx4 LRDIMM delivers maximum density per slot, letting the X11SPD-F reach its highest supported memory ceiling without populating every channel. Buyers who need more total memory must add identical modules; buyers who need standard registered or unbuffered ECC must choose a different product line. JEDEC and RoHS compliance ensure warranty-safe integration.

Privalumai

  • 128 GB capacity in a single module for dense server memory
  • ECC load-reduced design improves data integrity under heavy workloads
  • DDR4 2933 MHz CL21 at 1.2 V for efficient high-speed operation
  • 8Rx4 288-pin LRDIMM built for Supermicro X11SPD-F compatibility
  • JEDEC and RoHS compliant with backward support to 2133/2400/2666 MHz

Specifikacijos

BrandOWC
Part Number2L9D48R4128G
Capacity128GB
Type288-Pin DDR4 ECC LRDIMM
SpeedDDR4 2933 (PC4 23400)
CAS LatencyCL21
Voltage1.2V
ECCYes
Buffered/RegisteredLoad Reduced
Rank8Rx4
Heat SpreaderNo
Compatible SystemSupermicro Motherboard X11SPD-F

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Should I choose the 128GB LRDIMM or a smaller ECC registered module for my Supermicro X11SPD-F?

This single 128GB 8Rx4 LRDIMM is validated for the X11SPD-F; it cannot be mixed with registered or unbuffered memory, so select it only when the platform supports load-reduced DIMMs.

What does the 2933MHz PC4-23400 rating deliver once installed in the X11SPD-F?

The module runs at DDR4 2933 with CL21 latency and 1.2V, and it will down-clock automatically to 2666, 2400 or 2133 if the CPU or board requires a lower speed.

How does the 288-pin DDR4 LRDIMM interface affect maximum capacity and compatibility?

The 288-pin load-reduced design reduces electrical load on the memory bus, allowing high-density 128GB modules in server and workstation platforms that support LRDIMM, but it is not compatible with standard desktop boards.

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