Micron 64GB DDR4 2933MHz CL21 LRDIMM Server Memory
- 64GB
- 288-Pin DDR4 SDRAM
OWC
32 GB DDR5 4800 CL40 ECC registered 2Rx8 RDIMM replacement for Hynix HMCG88MEBRA107N HMCG88MEBRA113N HMCG88MEBRA115N HMCG88MEBRA174N
This OWC module is a 32GB DDR5 4800 registered DIMM built for workstations and servers. It carries ECC protection and a 2Rx8 rank layout on a 288-pin form factor. The module runs at 1.1V and conforms to JEDEC PC5-38400 timings with CL40 latency. It is sold new as a direct replacement for specific Hynix part numbers.
The single specification that decides fit is the registered ECC DDR5 4800 standard with 2Rx8 organisation. Standard desktop motherboards cannot use registered memory and will not post with this module installed. Mixing it with unbuffered or load-reduced DIMMs is also unsupported. Buyers must confirm their platform requires registered ECC DDR5 before purchasing.
This module suits administrators extending the life of qualified DDR5 server platforms or building new systems that specify registered ECC memory. It is not for desktop PC builders, laptop upgraders or anyone whose hardware calls for unbuffered or load-reduced DIMMs. Buyers needing a different capacity, speed or rank configuration should look at other modules.
| Brand | OWC |
|---|---|
| Part Number | 4R8D52R832GB |
| Capacity | 32GB |
| Type | 288-Pin DDR5 ECC RDIMM |
| Speed | DDR5 4800 (PC5 38400) |
| CAS Latency | CL40 |
| Voltage | 1.1V |
| ECC | Yes |
| Buffered/Registered | Registered |
| Rank | 2Rx8 |
| Heat Spreader | No |
CL40 sets the delay before data leaves the module; lower latency improves response time for transactional workloads, but overall throughput is also shaped by the memory controller and channel population.
PC5 38400 is the JEDEC designation for DDR5 4800 modules; it identifies the speed grade rather than guaranteeing a specific transfer ceiling in every system.
The module uses the standard 288-pin DDR5 RDIMM form factor; it installs in any server board that accepts registered ECC DDR5 DIMMs and clears the 1.1 V requirement.
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