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Eight green DDR5 RDIMM modules in anti-static packaging

OWC

OWC 1TB (8x128GB) DDR5 4800 CL40 4Rx4 288-pin 1.1V ECC Registered RDIMM Memory Upgrade Kit

SKU CH-8D6A-T1YSR

Eight 128 GB DDR5 4800 CL40 ECC registered RDIMMs totalling 1 TB for Lenovo ThinkSystem SD650 V3, SD650-I V3, SD665 V3, SD665-N V3 and SR630 V3 servers

  • Capacity1TB (8 x 128GB)
  • Type288-Pin DDR5 ECC RDIMM
  • SpeedDDR5 4800 (PC5 38400)
  • CAS LatencyCL40
  • Voltage1.1V
  • ECCYes

Capacity 1TB (8 x 128GB)

  • 1TB total capacity from eight 128GB modules
  • DDR5 4800 speed with CL40 latency
  • ECC registered design for server reliability
  • 1V operation reduces power draw
  • Compatible with ThinkSystem SD650 V3, SD650-I V3, SD665 V3, SD665-N V3, SR630 V3

Server-grade ECC RDIMM kit

This 1 TB kit contains eight 128 GB DDR5 4800 CL40 registered ECC modules built for Lenovo ThinkSystem SD650 V3, SD650-I V3, SD665 V3, SD665-N V3 and SR630 V3 servers. The 288-pin RDIMMs operate at 1.1 V and carry JEDEC-standard PC5-38400 ratings. They are designed for workloads that require error correction and registered buffering in multi-socket platforms. This memory will not work in standard desktop computers or alongside unbuffered or load-reduced DIMMs.

Sustained-load behaviour

Registered buffering and on-die ECC keep data integrity stable during continuous compute jobs across all populated channels. The CL40 latency and 4800 MT/s transfer rate deliver consistent throughput for virtualization, database and HPC tasks without the timing drift seen in unbuffered modules. Each 4Rx4 rank organization spreads electrical load evenly, helping the memory controller maintain signal quality under full population. Thermal performance relies on system airflow because the modules have no heat spreader.

Installation notes

Align the 288-pin key with the server DIMM slot and press until both latches engage; the registered design adds slight resistance compared to unbuffered sticks. Populate slots in the order prescribed by the ThinkSystem service guide to enable quad-channel operation and avoid boot failures. Mixing these RDIMMs with unbuffered or load-reduced memory will prevent the system from posting. Verify firmware is current before installing all eight modules to ensure capacity recognition.

Punti di forza

  • 1TB total capacity from eight 128GB modules
  • DDR5 4800 speed with CL40 latency
  • ECC registered design for server reliability
  • 1V operation reduces power draw
  • Compatible with ThinkSystem SD650 V3, SD650-I V3, SD665 V3, SD665-N V3, SR630 V3

Caratteristiche tecniche

BrandOWC
Part Number4R8D54R41TBK
Capacity1TB (8 x 128GB)
Type288-Pin DDR5 ECC RDIMM
SpeedDDR5 4800 (PC5 38400)
CAS LatencyCL40
Voltage1.1V
ECCYes
Buffered/RegisteredRegistered
Rank4Rx4
Heat SpreaderNo
Compatible SystemLenovo ThinkSystem SD650 V3
Lenovo ThinkSystem SD650-I V3
Lenovo ThinkSystem SD665 V3
Lenovo ThinkSystem SD665-N V3
Lenovo ThinkSystem SR630 V3

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Domande su questo articolo

How much heat does the 1.1V DDR5 4800 kit generate under continuous server load?

Each 128GB module runs at 1.1 volts without a heat spreader, so sustained power draw stays low; ensure the ThinkSystem chassis airflow meets Lenovo specifications for 4Rx4 registered DIMMs.

What must the server already have to accept these 288-pin ECC registered modules?

A Lenovo ThinkSystem SD650 V3, SD650-I V3, SD665 V3, SD665-N V3 or SR630 V3 with free DDR5 RDIMM slots and a BIOS that supports 4Rx4 registered ECC memory.

Can I mix these 4Rx4 CL40 sticks with the 2Rx4 modules already in my SR630 V3?

No — the kit uses 4Rx4 registered ECC and cannot be mixed with unbuffered, load-reduced or different-rank DIMMs; populate all channels with matching 4Rx4 modules for stable operation.

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