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Eight green DDR4 LRDIMM modules in anti-static tray

OWC

OWC 1TB (8x128GB) DDR4 2933 CL21 4Rx4 288-pin 1.2V ECC LRDIMM Kit for Supermicro X11SPA-TF

SKU CH-A6NJ-E4M2B

Eight 128 GB DDR4 2933 ECC load-reduced DIMMs totalling 1 TB, validated for Supermicro X11SPA-TF servers

  • Total capacity1 TB (8 × 128 GB)
  • Rated speedDDR4 2933 (PC4 23400)
  • CAS latencyCL21
  • Rated voltage1.2 V
  • Buffer typeLoad Reduced
  • Memory rank4Rx4

Capacity 1TB (8 x 128GB)

  • 1TB total capacity across eight 128GB modules
  • DDR4 2933 CL21 ECC load-reduced for server reliability
  • 2V operation with 4Rx4 organisation for high density
  • JEDEC and RoHS compliant for warranty-safe upgrades
  • Backward compatible with 2133, 2400 and 2666MHz systems

OWC 1TB DDR4 2933 ECC LRDIMM Kit

This kit provides 1TB of DDR4 2933 memory across eight 128GB modules for the Supermicro X11SPA-TF motherboard. Each 288-pin LRDIMM operates at 1.2V with CL21 latency and 4Rx4 organisation. ECC load-reduced technology supports data integrity in server and workstation environments.

Server Builders Needing Maximum Capacity

Suits administrators upgrading a Supermicro X11SPA-TF to its full 1TB limit with validated ECC load-reduced modules. Not for desktop PCs, laptops or consumer motherboards that accept only unbuffered or standard registered DIMMs. Builders requiring unbuffered ECC or registered ECC memory must select a different module type.

4Rx4 Load-Reduced Architecture

The 4Rx4 load-reduced design reduces electrical load on the memory controller, allowing eight 128GB modules to run at DDR4 2933 on the X11SPA-TF. Standard registered or unbuffered DIMMs cannot achieve this density on the platform. Mixing ranks or buffer types will prevent the system from posting.

How it compares

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

Price $5,537.99
Pricier than about 81% of the 21,161 comparable items (median $397.99).
Total capacity 1 TB (8 × 128 GB)
Higher than about 93% of the 20,941 comparable items (median 32 GB).
Price per GB $5.54 per GB
Cheaper than about 70% 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 nameOWC
Part number2L9D44R41TBK
Total capacity1 TB (8 × 128 GB)
Product type288-Pin DDR4 ECC LRDIMM
Performance
Rated speedDDR4 2933 (PC4 23400)
Memory
CAS latencyCL21
ECC supportYes
Buffer typeLoad Reduced
Memory rank4Rx4
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Compatible systemsSupermicro Motherboard X11SPA-TF

Other versions of this model

5 more in the same range

Questions about this item

Will the 288-pin LRDIMM modules fit the DIMM slots on my Supermicro X11SPA-TF motherboard?

Yes, the 288-pin DDR4 LRDIMM form factor matches the registered DIMM slots on the X11SPA-TF; the board accepts up to 12 modules so the 8-module kit installs directly.

What is the correct population order for the eight 128GB 4Rx4 modules on the X11SPA-TF?

Fill the eight slots associated with CPU1 first — DIMMA1, DIMMB1, DIMMC1, DIMMD1, DIMME1, DIMMF1, DIMMG1, DIMMH1 — before adding any modules to the CPU2 channels.

When should I expect to replace the 1.2V LRDIMMs in a 24/7 server workload?

DDR4 LRDIMMs typically run for five to seven years in continuous operation; plan replacement if corrected ECC error counts rise or the system logs recurring memory events.

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