We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Eight green DDR5 RDIMM sticks with gold contacts in a row

OWC

OWC 1TB (8×128GB) DDR5 4800 CL40 4Rx4 ECC RDIMM memory upgrade

SKU CH-D29Y-70BRG

Eight 128 GB DDR5 4800 CL40 ECC registered DIMMs deliver 1 TB for Lenovo ThinkSystem SR675 V3, SR850 V3, SR860 V3 and ST650 V3 servers

  • Total capacity1 TB (8 × 128 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • CAS latencyCL40
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • Memory rank4Rx4

Capacity 1TB (8 x 128GB)

  • 1TB total capacity across 8×128GB modules
  • DDR5 4800 speed with CL40 latency
  • ECC registered design for data integrity
  • 1V operation reduces power draw
  • Qualified for ThinkSystem SR675 V3, SR850 V3, SR860 V3, ST650 V3

Server ECC RDIMM kit

This OWC kit supplies 1 TB of DDR5 registered ECC memory as eight 128 GB modules. It is built for Lenovo ThinkSystem SR675 V3, SR850 V3, SR860 V3 and ST650 V3 servers that require registered DIMMs.

Registered ECC requirement

The modules are 4Rx4 registered ECC RDIMMs running at DDR5 4800 CL40 and 1.1 V. They will not work in systems that accept only unbuffered or load-reduced memory, so the platform must support registered ECC.

For ThinkSystem upgrades

Suitable for administrators expanding memory in the listed ThinkSystem models. Buyers needing unbuffered DIMMs, consumer desktop memory or a different capacity per module should look elsewhere.

How it compares

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

Price $32,525.99
Pricier than about 93% 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 $32.53 per GB
Pricier than about 90% 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 number4R8D54R41TBK
Total capacity1 TB (8 × 128 GB)
Product type288-Pin DDR5 ECC RDIMM
Performance
Rated speedDDR5 4800 (PC5 38400)
Memory
CAS latencyCL40
ECC supportYes
Buffer typeRegistered
Memory rank4Rx4
Heat spreaderNo
Power
Rated voltage1.1 V
Compatibility
Compatible systemsLenovo ThinkSystem SR675 V3
Lenovo ThinkSystem SR850 V3
Lenovo ThinkSystem SR860 V3
Lenovo ThinkSystem ST650 V3

Other versions of this model

5 more in the same range

Questions about this item

What does the 4800 MT/s speed mean once the modules are installed in a ThinkSystem server?

The kit runs at the JEDEC-standard DDR5 4800 data rate with CL40 timing, delivering the rated throughput on the supported Lenovo platforms without overclocking.

What does the PC5-38400 designation cap in practice?

PC5-38400 is the JEDEC label for DDR5 4800; the registered buffer and on-die ECC operate within that spec, so bandwidth and latency stay at the standard ceiling.

What physical slot and clearance do these 128 GB RDIMMs need?

Each module is a 288-pin DDR5 RDIMM without a heat spreader, so it fits standard server DIMM sockets and clears typical CPU coolers in the SR675 V3, SR850 V3, SR860 V3 and ST650 V3.

More in Model-Specific Memory Upgrades

Similar items