HMCG78AEBRA168N - 16GB DDR5-4800 ECC RDIMM | SK hynix
部品番号: HMCG78AEBRA168N ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $89 | $89.00 |
| 10 | $85.5 | $855.00 |
| 100 | $81 | $8,100.00 |
| 500 | $77.5 | $38,750.00 |
| 1,000 | $74 | $74,000.00 |
HMCG78AEBRA168N 概要
A Registered DIMM (RDIMM) is a memory module that buffers the command, address, and control signals through a register (RCD) before they reach the DRAM chips. This buffering reduces electrical loading on the memory controller, allowing servers to support higher module counts and larger total memory capacity than unbuffered memory. RDIMMs sit in the hierarchy of server memory: DRAM IC -> memory module -> memory subsystem of a data-center server, alongside LRDIMMs (which additionally buffer data) and UDIMMs/SODIMMs (unbuffered, client-class). ECC (Error Correcting Code) is a mandatory feature in this class, correcting single-bit errors to protect data integrity in always-on systems.
Key features of the HMCG78AEBRA168N include 4800 MT/s data rate at PC5-38400 bandwidth class, on-module ECC for single-bit error correction, and the DDR5 1.1V low-voltage operating point that cuts module power versus DDR4 1.2V RDIMMs. The DDR5 architecture also splits each module into two independent 32-bit subchannels and moves the power management IC (PMIC) onto the module, improving channel efficiency and power regulation granularity. The 1Rx8 organization uses single-rank, x8-wide DRAM configuration, minimizing rank interleaving overhead and controller loading.
Technically, the module builds on SK hynix 1z-nm-class DDR5 DRAM die with on-die ECC (ODE), which corrects bit errors internal to the DRAM array before they propagate on the data bus. The registered architecture uses a DDR5 Registering Clock Driver to offload CA signal loading. CL40 (CAS Latency 40) at 4800 MT/s yields roughly 16.7 ns effective tCL, a typical operating point for the DDR5-4800 server JEDEC speed bin.
Typical applications include enterprise rack servers, high-performance workstations, virtualization and database hosts, and blade systems from Dell, HPE, Lenovo, and Supermicro that accept DDR5-4800 RDIMMs.
Design consideration: verify that the platform BIOS lists this exact 1Rx8 16GB speed bin as validated; mixed-rank and mixed-vendor populations may force lower common speeds.
This page adds distributor pricing context, drop-in alternatives, compatibility guidance, and practical design notes beyond what the manufacturer datasheet provides.
ドロップイン代替品: HMCG78AEBRA168N — 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: HMCG78AEBRA168N （同一形状・フットプリント） — 相違点: Data Rate, Form Factor, Memory Type, Module Type, ECC.
クイック比較ツール — 並列比較する代替部品を選択:
HMCG78AEBRA115N
✅ ドロップイン✓ 在庫あり
$541.4063 / 個
データシートを見る →HMCG78MEBSA092N
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$286.3636 / 個
データシートを見る →A-Tech 16GB DDR5-4800 RDIMM PC5-38400R
✅ ドロップイン📋 参考代替品（カタログ未掲載）
HMCG78AEBRA168N 最大定格＆電気的特性
| Capacity | 16 GB |
| メモリタイプ | DDR5 SDRAM |
| Module Type | 288-Pin ECC Registered RDIMM |
| データレート | 4800 MT/s |
| Bandwidth Class | PC5-38400 |
| メモリ構成 | 1Rx8 (single rank, x8) |
| CASレイテンシ | CL40 |
| Operating Voltage | 1.1 V |
| Pins | 288 |
| Error Correction | ECC (on-module, registered) |
| Form Factor | 288-pin DIMM (server class) |
| Application | Enterprise server / workstation |
| JEDEC Compliance | DDR5 RDIMM JEDEC compliant |
| Rank | Single rank |
HMCG78AEBRA168N standard ピン配置ガイド
HMCG78AEBRA168N (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: HMCG78AEBRA168N.
詳細は データシート をご参照ください。
主な用途
HMCG78AEBRA168N の用途: 6 件s: Enterprise Rack Servers, Virtualization Hosts, Database Servers, High-Performance Workstations, Blade and Dense Compute Nodes, Memory Fleet Refresh / Spares Pool.
Enterprise Rack Servers
The HMCG78AEBRA168N fits enterprise rack servers that require JEDEC-standard DDR5-4800 RDIMMs, where its 16GB 1Rx8 organization keeps per-channel electrical loading low enough to sustain full 4800 MT/s across all populated channels. The on-module register buffers command/address signals so 16-24 DIMM slots per 2-socket server remain within controller timing budget, and module ECC corrects single-bit errors that would otherwise cause unplanned reboots in always-on infrastructure. At 1.1V per module, a 16-slot server saves meaningful power versus DDR4-3200 RDIMM equivalents. Deploy in matched sets per channel and follow the OEM population-order guide to maintain interleaving.
おすすめ
Virtualization Hosts
Virtualization platforms (VMware ESXi, KVM, Hyper-V) benefit directly from the HMCG78AEBRA168N's combination of 4800 MT/s bandwidth and ECC reliability. VM consolidation multiplies memory access concurrency, so the two independent 32-bit DDR5 subchannels per module improve effective bandwidth under mixed read/write workloads versus DDR4. Module-level ECC plus on-die ECC in the underlying DDR5 die protects hypervisor and guest memory pages from soft errors during months of uptime. Populate channels symmetrically with identical 1Rx8 modules so the memory controller runs all channels at the same speed; mixing ranks or vendors can force a common-clock downclock to 4400 or 4000 MT/s.
おすすめ
Database Servers
In-memory and buffer-pool-heavy database workloads (OLTP indexes, analytics caches) push sustained sequential bandwidth, which the HMCG78AEBRA168N supplies at PC5-38400 (38.4 GB/s theoretical per module). Single-rank 1Rx8 modules reduce bus turnaround penalties at moderate channel populations, while ECC protects against the silent data corruption that is unacceptable for transactional logs. The 1.1V operation also lowers thermal load inside dense 1U/2U chassis, easing chassis fan curves. Size memory so the working set fits in DRAM; add modules in power-of-two channel groups and verify post-memory-training speed reports in the BIOS to confirm all channels negotiated 4800 MT/s.
おすすめ
High-Performance Workstations
Professional workstations certified for RDIMMs (rendering, simulation, FPGA prototyping hosts) accept the HMCG78AEBRA168N where the platform is built on server-class chipsets (Intel Xeon W, AMD Threadripper PRO). Registered buffering lets these platforms populate 8 DIMM slots at full speed - consumer UDIMMs cannot. The 4800 MT/s rate accelerates bandwidth-bound stages such as finite-element solvers and 8K video scrubbing, while ECC prevents silent render corruption during multi-hour jobs. Note that workstation boards often enforce stricter QVLs than servers; confirm 16GB 1Rx8 4800 support in the board's memory list and populate per the 4-DIMM or 8-DIMM interleaving map.
おすすめ
Blade and Dense Compute Nodes
Blade chassis and high-density compute trays value the HMCG78AEBRA168N's single-rank 1Rx8 build, which presents minimal electrical load and modest thermal dissipation per slot - important where airflow per blade is constrained. Registered DDR5 modules include an on-module PMIC that regulates the 1.1V DRAM rail locally, isolating module power from slot-supply droop in shared-backplane designs. ECC remains mandatory in this segment because blade nodes often run unattended for years. Follow the chassis vendor's memory population table; dense nodes frequently require balanced rank distribution across all memory controllers to reach advertised memory bandwidth.
おすすめ
Memory Fleet Refresh / Spares Pool
For data centers standardizing a spares pool across mixed DDR5 server generations, the HMCG78AEBRA168N is a cost-effective canonical spare: 16GB 1Rx8 1.1V is the most common DDR5-4800 RDIMM population unit, maximizing interchangeability across Dell, HPE, Lenovo, and Supermicro platforms. JEDEC standardization means a JEDEC-compliant module trains at each platform's supported speed automatically, though OEM QVL lockouts should be checked for warranty-sensitive deployments. Keep a 5-10% spare ratio per platform type and store modules in ESD-safe antistatic packaging; DDR5 modules with on-module PMICs are more ESD-sensitive than DDR4 predecessors.
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: HMCG78AEBRA168N — 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 | HMCG78AEBRA115N | HMCG78MEBSA092N | A-Tech 16GB DDR5-4800 RDIMM |
|---|---|---|---|---|
| Package | 288-pin DDR5 RDIMM | 288-pin DDR5 RDIMM - same | 288-pin DDR5 RDIMM - same | 288-pin DDR5 RDIMM - same |
| Brand | SK hynix | SK hynix | SK hynix | A-Tech (third-party compatible) |
| Data Rate | 4800 MT/s (PC5-38400) | 4800 MT/s (PC5-38400) | 4800 MT/s (PC5-38400) | 4800 MT/s (PC5-38400) |
| Operating Voltage | 1.1 V | 1.1 V | 1.1 V | 1.1 V |
| ECC / Registered | Yes / Yes (RDIMM) | Yes / Yes | Yes / Yes | Yes / Yes |
主な差別化要因
- 1Rx8 single-rank organization minimizes controller loading （vs HMCG78MEBSA092N)
- Genuine SK hynix OEM silicon with suffix-matched family replacement （vs A-Tech 16GB DDR5-4800 RDIMM)
- DDR5-4800 at 1.1V balances bandwidth and power （vs HMA84GR7CJR4N-XN)
設計ノート
Never mix RDIMMs with UDIMMs or LRDIMMs in one platform - DDR5 keying prevents it physically, and mixing rank counts or vendors across channels commonly forces all channels down to a lower common speed (e.g., 4400 MT/s). Check the server OEM qualified vendor list (QVL) for the exact suffix (168N vs 115N) before large deployments; OEM validation is per-suffix, not per-family. Population order matters: fill white/black channel slots per the OEM interleaving map to preserve 4-channel or 8-channel interleaving.
DDR5 RDIMMs include an on-module PMIC and support optional hardware thermal sensors; populated server chassis typically maintain DIMM inlet air at or below the JEDEC-recommended operating range. In dense 1U configurations, verify module spacing and heat-spreader contact - single-rank 1Rx8 modules like this one dissipate less than dual-rank parts, easing marginal airflow zones. Enable the platform's memory thermal throttling policy so the BMC can derate speed on over-temperature events instead of hard-failing.
DDR5 modules are more ESD-sensitive than DDR4 because the PMIC sits on the module itself. Always handle by the edges with a grounded wrist strap, store in shielded antistatic bags, and never touch the gold edge fingers. After installation, verify in BIOS that each module trained at 4800 MT/s - a module reporting a lower trained speed usually indicates a population-rule issue, not a defective module.
コンプライアンス情報
JEDEC-compliant DDR5 RDIMM per distributor listings (CoreWave Labs); formal RoHS/REACH declarations not found in provided data.
