HMCG78AHBRA471N - 16GB DDR5-6400 RDIMM ECC | SK Hynix
料号： HMCG78AHBRA471N ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $649 | $649.00 |
| 10 | $719 | $7,190.00 |
| 100 | $829 | $82,900.00 |
| 500 | $959 | $479,500.00 |
| 1,000 | $1099 | $1,099,000.00 |
HMCG78AHBRA471N 概述
An RDIMM (Registered DIMM) is a server-class memory module that buffers the address and command signals through a register chip before they reach the DRAM devices. This buffering reduces the electrical load on the memory controller, allowing servers to support more DIMMs per channel and higher total memory capacities than unbuffered UDIMMs. In the memory hierarchy, RDIMM sits under the broader categories of DDR5 SDRAM memory module, dynamic RAM, and volatile semiconductor memory, and it is the standard choice for enterprise servers, storage systems, and workstations.
Key features of this module include a 6400 MT/s data rate delivering 51.2 GB/s of peak bandwidth per module, on-module ECC (Error Correcting Code) that detects and corrects single-bit memory errors for data integrity, and the low 1.1V operating voltage of the DDR5 generation, which reduces power consumption versus the 1.2V of DDR4. DDR5 architecture also moves the power management IC onto the module itself, improving power delivery granularity.
The 1Rx8 organization uses single-rank x8 DRAM devices, which typically offer lower controller load and better power characteristics than dual-rank equivalents, at the cost of peak parallelism. The 288-pin edge connector is the standard JEDEC-defined footprint for DDR5 server memory; DDR5 RDIMMs are mechanically keyed so they cannot be inserted into DDR4 or DDR3 slots.
Typical applications include entry-level virtualization hosts, edge compute nodes, small-scale business servers, storage controllers, and network appliances that require reliable registered DDR5 memory.
Design consideration: always verify that the host platform BIOS and CPU memory controller explicitly support 6400 MT/s RDIMMs; otherwise the module will default to a lower JEDEC speed bin.
This page synthesizes distributor pricing, same-footprint SK Hynix alternatives, and practical deployment notes not found on individual distributor listings.
直接替换替代料： HMCG78AHBRA471N ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： HMCG78AHBRA471N （相同外形与封装尺寸） ——差异在于 Form Factor, Data Rate, ECC, Memory Type, Module Type.
快速对比工具——选择替代料号进行并排对比：
HMCG78AHBRA289N
✅ 直接替换✓ 有现货
$68 / 个
查看数据手册 →HMCG78AEBRA107N
✅ 直接替换✓ 有现货
$399 / 个
查看数据手册 →HMCG78AEBRA168N
✅ 直接替换✓ 有现货
$74 / 个
查看数据手册 →HMCG78AGBUA081N
✅ 直接替换✓ 有现货
$244.95 / 个
查看数据手册 →HMCG78AGBUA084N
✅ 直接替换✓ 有现货
$262.5 / 个
查看数据手册 →HMCG78MEBRA113N
✅ 直接替换✓ 有现货
$94 / 个
查看数据手册 →HMCG78MEBSA092N
✅ 直接替换✓ 有现货
$286.3636 / 个
查看数据手册 →HMCG78CGBSA095N
✅ 直接替换✓ 有现货
$46.5 / 个
查看数据手册 →HMCG78AHBRA471N 最大额定值与电气特性
| Manufacturer | SK Hynix |
| MPN | HMCG78AHBRA471N |
| 存储器类型 | DDR5 SDRAM |
| Module Type | 288-Pin ECC Registered DIMM (RDIMM) |
| Total Capacity | 16 GB |
| 数据速率 | 6400 MT/s |
| PC Bandwidth Designation | PC5-51200 |
| Rank x Organization | 1Rx8 (Single Rank, x8) |
| CAS 延迟 | CL52 |
| Operating Voltage | 1.1 V |
| Error Correction | ECC |
| Pins | 288 |
| Country of Origin | Malaysia |
| Application | Server / Enterprise |
| Condition (ServerSupply listing) | Brand New, In Stock |
| 特性 | ECC Memory, Registered |
HMCG78AHBRA471N standard 引脚配置指南
HMCG78AHBRA471N（standard 封装）的引脚配置。 该数字 IC 包含 GPIO、通信接口（UART、SPI、I2C）和电源引脚。请参阅制造商数据手册以了解复用引脚功能和配置选项。对嵌入式系统设计和 PCB 布局至关重要。
暂无详细引脚数据： HMCG78AHBRA471N.
请参阅 数据手册 以查看完整引脚配置。
典型应用
HMCG78AHBRA471N 适用于 6 应用s: Entry-Level Virtualization Servers, Edge Compute Nodes, Small-Scale Business Servers, Storage Controllers and NAS, Workstation Memory Upgrades, Network Appliances and Firewalls.
Entry-Level Virtualization Servers
The HMCG78AHBRA471N fits entry-level virtualization hosts that balance per-VM memory allocation against channel bandwidth. Its 6400 MT/s (PC5-51200, 51.2 GB/s peak) data rate gives hypervisors such as VMware ESXi and Proxmox sufficient memory bandwidth for consolidated workloads, while ECC protection corrects single-bit errors that could otherwise corrupt guest memory. The registered (buffered) interface reduces electrical load on the memory controller, allowing all DIMM channels to be populated for maximum interleaving. Corewave Labs specifically positions this module for entry-level virtualization, edge compute, and small-scale servers. Populate DIMMs in matched sets per the server vendor's population rules to enable multi-channel interleaving at full speed.
推荐
Edge Compute Nodes
Edge compute appliances benefit from the HMCG78AHBRA471N's combination of DDR5 efficiency and data integrity. Operating at 1.1V (versus DDR4's 1.2V), the module reduces memory subsystem power, which matters in passively cooled or thermally constrained edge enclosures. On-module ECC prevents silent data corruption in unattended remote sites where physical service visits are costly. The 16GB single-rank configuration provides a predictable memory footprint for container runtimes, local caching tiers, and inferencing workloads at the network edge. Distributors such as Corewave Labs explicitly target this module at edge compute deployments. Pair it with a server-class CPU platform whose BIOS supports the 6400 MT/s bin, or accept automatic down-clocking to the platform maximum.
推荐
Small-Scale Business Servers
For small and medium business servers running databases, file services, and email workloads, the HMCG78AHBRA471N delivers enterprise-grade reliability at a 16GB per-module price point. ECC registered DDR5 protects business-critical data against bit-level errors, and the 6400 MT/s bin (PC5-51200) keeps database buffer pools and virtual memory subsystems responsive. The 288-pin RDIMM conforms to the JEDEC DDR5 server standard, ensuring compatibility with mainstream tower and rack platforms from major OEMs. ServerSupply lists the module as brand new and in stock as of 2026-09-05, simplifying procurement for system integrators building small-server BOMs. Verify the platform QVL lists 1Rx8 modules at this speed bin before volume deployment.
推荐
Storage Controllers and NAS
Storage systems and NAS head units use ECC registered memory to guarantee data integrity between host and disk arrays. The HMCG78AHBRA471N's ECC corrects single-bit errors before they propagate into written data or filesystem metadata, and its registered buffering maintains signal integrity on heavily loaded memory buses typical of storage controllers. The 51.2 GB/s peak bandwidth (PC5-51200) supports RAID parity calculation, deduplication tables, and caching layers. The single-rank 1Rx8 organization presents lower controller load, useful when the storage platform populates many DIMM slots. Use matched modules across channels to maximize interleaved bandwidth for streaming and backup workloads, and confirm the storage OS vendor certifies DDR5-6400 RDIMMs.
推荐
Workstation Memory Upgrades
Professional workstations built on server-derived chipsets (Intel Xeon W, AMD Threadripper PRO) accept RDIMMs and benefit from the HMCG78AHBRA471N's enterprise reliability. Content creation, CAD, simulation, and local AI development workloads consume large memory footprints, and ECC protects long-running render or training jobs from silent bit errors that would force costly restarts. The 6400 MT/s rate supplies 51.2 GB/s peak bandwidth per module for memory-bound tasks such as finite-element analysis and video editing timelines. The 1.1V DDR5 operating voltage lowers sustained thermal output in quiet workstation chassis. Check the workstation vendor's QVL, since some consumer-tier boards accept only UDIMMs and cannot host RDIMMs at all.
推荐
Network Appliances and Firewalls
High-throughput network appliances - firewalls, SD-WAN gateways, and load balancers - rely on fast, reliable memory for session tables, deep packet inspection buffers, and TLS session caches. The HMCG78AHBRA471N's 6400 MT/s interface supplies 51.2 GB/s peak bandwidth for line-rate packet processing, while ECC prevents the subtle bit errors that could corrupt security-critical session state. The registered DDR5 interface supports full channel population in short-depth appliances, and the 16GB 1Rx8 configuration suits appliances with moderate DRAM budgets. Its 1.1V operation helps meet the power envelopes of fanless and short-depth network hardware. Validate BIOS support for DDR5-6400 RDIMMs on the appliance platform before deployment.
推荐
推荐产品汇总
工程参考数据： HMCG78AHBRA471N ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | HMCG78AHBRA289N | HMCG78AEBRA107N | HMCG78AGBUA084N | HMCG78MEBRA113N |
|---|---|---|---|---|---|
| Package | 288-Pin DDR5 RDIMM | 288-Pin DDR5 RDIMM - same | 288-Pin DDR5 RDIMM - same | 288-Pin DDR5 RDIMM - same | 288-Pin DDR5 RDIMM - same |
| Brand | SK Hynix | SK Hynix | SK Hynix | SK Hynix | SK Hynix |
| Module Type | ECC Registered DIMM | ECC RDIMM | ECC RDIMM | ECC RDIMM | ECC RDIMM |
| Operating Voltage | 1.1 V | 1.1 V | 1.1 V | 1.1 V | 1.1 V |
| ECC | Yes | Yes | Yes | Yes | Yes |
关键差异点
- Top-tier DDR5 speed bin （对比 HMCG78AHBRA289N)
- Single-rank 1Rx8 organization （对比 HMCG78AGBUA084N)
- ECC registered reliability for server data integrity （对比 HMCG78MEBSA092N)
设计说明
Never mix RDIMMs with UDIMMs or SODIMMs on the same platform: DDR5 registered modules cannot coexist with unbuffered modules on any channel, and all modules in a server should share the same rank count and speed bin to ensure reliable memory training. The HMCG78AHBRA471N is 1Rx8 - when populating a channel with multiple DIMMs, prefer identical MPNs to guarantee uniform timing. Note this module is a DDR5 288-pin part and is mechanically keyed to prevent insertion into DDR4 slots; forcing it will damage both module and slot.
Verify platform support for the 6400 MT/s bin before procurement. Many server platforms qualified at launch only certify RDIMMs up to 5600 MT/s; a 6400 MT/s module such as the HMCG78AHBRA471N will train to a lower JEDEC bin in that case, leaving bandwidth unused. Consult the CPU vendor's memory QVL and the server BIOS release notes. For AMD EPYC and Intel Xeon Scalable systems, full 6400 MT/s support typically requires one DIMM per channel (1DPC) population; 2DPC configurations often down-clock.
Server memory subsystems rely on chassis airflow across DIMM channels. DDR5 moves the PMIC onto the module, adding a local heat source compared to DDR4, so maintain the server vendor's specified airflow paths and install DIMM heatsinks or fillers as specified in the chassis manual. Estimated: at 1.1V a fully populated 16-channel server draws tens of watts in the memory domain alone; blocked airflow can push DRAM above the JEDEC refresh-temperature threshold, triggering 2x refresh rate and increased latency.
合规信息
Compliance data not provided in verified web sources. SK Hynix enterprise modules are typically RoHS compliant, but confirm via official SK Hynix product documentation.
