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
Four green DDR4 ECC registered DIMMs in static bags

OWC

OWC 256GB (4x64GB) DDR4 2933 PC4-23400 CL21 2Rx4 288-pin 1.2V ECC Registered DIMM memory upgrade

SKU CH-61TF-W3HWQ

Four 64 GB DDR4 2933 ECC registered DIMMs totalling 256 GB for HP Apollo 4200 Gen10 and 6500 Gen10 servers

  • Total capacity256 GB (4 × 64 GB)
  • Rated speedDDR4 2933 (PC4 23400)
  • CAS latencyCL21
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank2Rx4

Capacity 256GB (4 x 64GB)

  • ECC registered design protects data integrity in servers
  • 256 GB total capacity across four 64 GB modules
  • DDR4 2933 speed with CL21 latency at 1.2 V
  • Compatible with HP Apollo 4200 Gen10 and 6500 Gen10
  • Backward compatible with 2133, 2400 and 2666 MHz systems

Server-grade ECC registered kit

This OWC kit delivers 256 GB of DDR4 ECC registered memory in four 64 GB modules. It is built for HP Apollo 4200 Gen10 and 6500 Gen10 servers and workstations that require registered DIMMs with error correction. The modules will not work in standard desktop PCs or in systems that use unbuffered or load-reduced memory.

DDR4 2933 registered interface limits

The modules run at 2933 MT/s with CL21 latency at 1.2 V and conform to the PC4-23400 standard. They are backward compatible with 2133, 2400 and 2666 MT/s bus speeds, so they will clock down automatically when the platform requires it. Registered signalling adds one cycle of command delay, which is mandatory for the supported Apollo platforms.

256 GB capacity for dense workloads

Four 64 GB 2Rx4 DIMMs fill four slots and provide the maximum supported density per module for these Apollo systems. The kit suits virtualisation, large databases and high-thread-count compute where memory capacity is the primary bottleneck. Systems that need more than 256 GB per socket or that only accept unbuffered DIMMs cannot use this kit.

How it compares

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

Price $1,587.99
Pricier than about 65% of the 21,161 comparable items (median $397.99).
Total capacity 256 GB (4 × 64 GB)
Higher than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $6.20 per GB
Cheaper than about 63% 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 number2R9D42R4256S
Total capacity256 GB (4 × 64 GB)
Product type288-Pin DDR4 ECC RDIMM
Performance
Rated speedDDR4 2933 (PC4 23400)
Memory
CAS latencyCL21
ECC supportYes
Buffer typeRegistered
Memory rank2Rx4
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Compatible systemsHP Apollo 4200 Gen10
HP Apollo 6500 Gen10

Other versions of this model

5 more in the same range

Questions about this item

Should I choose the 256 GB kit with four 64 GB modules or a smaller capacity?

The kit provides 256 GB total across four 64 GB modules, matching the maximum supported configuration for the HP Apollo 4200 Gen10 and 6500 Gen10 servers.

What does the 2933 MHz rating deliver in my server?

The modules run at DDR4 2933 (PC4-23400) with CL21 latency, and will down-clock to 2666, 2400 or 2133 MHz if the platform requires a lower speed.

Is the 288-pin ECC registered interface compatible with standard desktop boards?

No — these are 288-pin DDR4 ECC registered DIMMs designed for server and workstation platforms only; they will not work in unbuffered desktop motherboards.

More in Model-Specific Memory Upgrades

Similar items