HMCG78AHBRA471N - 16GB DDR5-6400 RDIMM ECC | SK Hynix
部品番号: HMCG78AHBRA471N ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 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 概要
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.
ドロップイン代替品: HMCG78AHBRA471N — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: HMCG78AHBRA471N （同一形状・フットプリント） — 相違点: Form Factor, Data Rate, ECC, Memory Type, Module Type.
クイック比較ツール — 並列比較する代替部品を選択:
HMCG78AHBRA289N
✅ ドロップイン✓ 在庫あり
$68 / 個
データシートを見る →HMCG78AEBRA107N
✅ ドロップイン✓ 在庫あり
$399 / 個
データシートを見る →HMCG78AEBRA168N
✅ ドロップイン✓ 在庫あり
$74 / 個
データシートを見る →HMCG78AGBUA081N
✅ ドロップイン✓ 在庫あり
$244.95 / 個
データシートを見る →HMCG78AGBUA084N
✅ ドロップイン✓ 在庫あり
$262.5 / 個
データシートを見る →HMCG78MEBRA113N
✅ ドロップイン✓ 在庫あり
$94 / 個
データシートを見る →HMCG78MEBSA092N
✅ ドロップイン✓ 在庫あり
$286.3636 / 個
データシートを見る →HMCG78CGBSA095N
✅ ドロップイン✓ 在庫あり
$46.5 / 個
データシートを見る →HMCG78AHBRA471N 最大定格＆電気的特性
| Manufacturer | SK Hynix |
| MPN | HMCG78AHBRA471N |
| メモリタイプ | DDR5 SDRAM |
| Module Type | 288-Pin ECC Registered DIMM (RDIMM) |
| Total Capacity | 16 GB |
| データレート | 6400 MT/s |
| PC Bandwidth Designation | PC5-51200 |
| Rank x Organization | 1Rx8 (Single Rank, x8) |
| CASレイテンシ | 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 |
| 特長 | ECC Memory, Registered |
HMCG78AHBRA471N standard ピン配置ガイド
HMCG78AHBRA471N (standard パッケージ) のピン配置。 このデジタルICには、GPIO、通信インターフェース (UART、SPI、I2C)、および電源ピンが含まれています。代替ピン機能と設定オプションについては、メーカーのデータシートを参照してください。組み込みシステム設計とPCBレイアウトに不可欠です。
詳細なピン配置データはありません: HMCG78AHBRA471N.
詳細は データシート をご参照ください。
主な用途
HMCG78AHBRA471N の用途: 6 件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.
おすすめ
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.
おすすめ
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.
おすすめ
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.
おすすめ
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.
おすすめ
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.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: HMCG78AHBRA471N — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | 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 |
主な差別化要因
- Top-tier DDR5 speed bin （vs HMCG78AHBRA289N)
- Single-rank 1Rx8 organization （vs HMCG78AGBUA084N)
- ECC registered reliability for server data integrity （vs HMCG78MEBSA092N)
設計ノート
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.
コンプライアンス情報
Compliance data not provided in verified web sources. SK Hynix enterprise modules are typically RoHS compliant, but confirm via official SK Hynix product documentation.
