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Single green 288-pin DDR4 RDIMM, black chips, no heat spreader

OWC

OWC 128GB DDR4 2933 ECC Registered RDIMM 288-pin memory upgrade

SKU CH-QMF9-1A97G

Single 128 GB DDR4 2933 ECC registered RDIMM for TYAN S7100 and Lenovo ThinkSystem SR860, SR950 servers

  • Total capacity128 GB
  • Rated speedDDR4 2933 (PC4 23400)
  • CAS latency21
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank8Rx4
  • 128GB single module expands server capacity
  • ECC registered design protects data integrity in critical workloads
  • DDR4 2933 CL21 timing delivers responsive performance at 1.2V
  • JEDEC and RoHS compliant for warranty-safe upgrades
  • Validated for TYAN S7100 and Lenovo ThinkSystem SR860 SR950 platforms

Server ECC RDIMM Upgrade

This 128GB DDR4 2933 module is an ECC registered RDIMM built for TYAN S7100 series motherboards and Lenovo ThinkSystem SR860 and SR950 servers. It operates at 1.2V with CL21 latency and an 8Rx4 rank configuration. The registered buffer and error correction make it suitable only for workstation and server platforms; it will not work in standard desktop computers.

Capacity and Headroom

A single 128GB stick provides very high density for memory-intensive server workloads such as virtualization, large databases or in-memory analytics. The 8Rx4 organisation delivers this capacity within one 288-pin slot, leaving remaining DIMM sockets free for further expansion. Systems that cannot address 128GB per module or that require unbuffered or load-reduced DIMMs cannot use this memory.

DDR4 2933 Interface Limits

The module runs at the JEDEC-standard PC4-23400 2933 MT/s rate and is backward compatible with 2133, 2400 and 2666 MT/s bus speeds. Registered signalling adds one clock cycle of latency versus unbuffered DDR4, which is the expected trade-off for signal integrity at high capacity. Mixing this RDIMM with unbuffered or load-reduced modules is not supported and will prevent the system from booting.

How it compares

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

Price $749.99
Pricier than about 57% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB
Higher than about 70% of the 20,941 comparable items (median 32 GB).
CAS latency 21
Lower than about 63% of the 483 comparable items (median 22).
Price per GB $5.86 per GB
Cheaper than about 67% 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 number2R9D48R4128G
Total capacity128 GB
Product type288-Pin DDR4 ECC RDIMM
Performance
Rated speedDDR4 2933 (PC4 23400)
Memory
CAS latency21
ECC supportYes
Buffer typeRegistered
Memory rank8Rx4
Heat spreaderNo
Power
Rated voltage1.2 V

Questions about this item

Will this DDR4 2933 module down-clock to 2133, 2400 or 2666 MHz if my current Xeon system only runs at those speeds?

Yes, the module is backward compatible with 2133 MHz, 2400 MHz and 2666 MHz systems and will run at the highest speed the platform supports.

How can I confirm the 128 GB ECC registered DIMM is detected and error-correction is active after installation?

Check the BIOS memory summary for 128 GB at 2933 MT/s with ECC enabled, then run a memory diagnostic such as MemTest86 to verify zero correctable errors.

Does the single 288-pin 1.2 V 8Rx4 RDIMM ship alone, or are brackets, cables or extra modules included?

The package contains only the 128 GB DDR4 2933 CL21 ECC registered RDIMM; no brackets, cables or additional modules are supplied.

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