HMAA8GR7DJR4N-VK - 64GB DDR4-2666 RDIMM 288-Pin | SK hynix
部品番号: HMAA8GR7DJR4N-VK ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $145 | $145.00 |
| 10 | $139.2 | $1,392.00 |
| 100 | $132.75 | $13,275.00 |
| 500 | $127.5 | $63,750.00 |
| 1,000 | $122.4 | $122,400.00 |
HMAA8GR7DJR4N-VK 概要
A registered DIMM (RDIMM) is a memory module that buffers the address, command, and control 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 higher module counts per channel than unbuffered UDIMMs. RDIMMs occupy the top of the memory hierarchy for mission-critical computing: memory module -> registered DIMM -> DDR4 SDRAM family -> volatile main memory. The HMAA series is based on SK hynix 8Gb-class DDR4 DRAM die in FBGA packaging.
Key features include 64 GB capacity per module, dual-rank x4 organization which enables single-bit error correction with the on-module ECC logic, a 288-pin edge connector with keyed notches that prevent insertion into incompatible slots, and a 1.2V supply typical of the DDR4 generation, cutting module power roughly in half versus DDR3 at equivalent bandwidth. The -VK speed grade is qualified for 2666 MT/s operation in server platforms.
The registered architecture uses a register IC on the command/address path and a onboard PMIC (management power rail per JEDEC DDR4 RDIMM definition) to deliver stable VDD to the DRAM stacks. At 2666 MT/s with CL19-class latency, the module sustains approximately 21.3 GB/s per channel of theoretical peak bandwidth. Thermal behavior is managed through a thermal sensor option and spreader-free standard-height PCB.
Typical applications include enterprise server main memory for 2-socket rack servers such as Dell PowerEdge, HPE ProLiant, and Lenovo ThinkSystem platforms, virtualization hosts with high VM density, and in-memory database workloads where capacity per channel directly determines workload footprint. Data-center memory upgrades and OEM server builds are the primary purchase contexts.
Design and installation consideration: this RDIMM must only be installed in registered-memory server platforms; it is electrically and mechanically incompatible with desktop UDIMM or SODIMM slots. Mixing -VK parts with different speed grades typically forces the whole channel down to the lowest common speed.
This page synthesizes distributor availability data, same-footprint drop-in alternatives within the SK hynix DDR4 RDIMM family, and practical deployment notes beyond the raw part number decode.
ドロップイン代替品: HMAA8GR7DJR4N-VK — 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: HMAA8GR7DJR4N-VK （同一形状・フットプリント） — 相違点: ECC, Module Type, Organization, Form Factor, Memory Capacity.
クイック比較ツール — 並列比較する代替部品を選択:
HMAA8GR7AJR4N-VK
✅ ドロップイン📋 参考代替品（カタログ未掲載）
HMAA8GR7CJR4N-XN
✅ ドロップイン📋 参考代替品（カタログ未掲載）
HMAA8GR7CJR4N-RD
✅ ドロップイン✓ 在庫あり
$162 / 個
データシートを見る →HMAA8GR7AJR4N-WM
✅ ドロップイン📋 参考代替品（カタログ未掲載）
HMA84GR7DJR4N-VK
✅ ドロップイン✓ 在庫あり
$377.3438 / 個
データシートを見る →HMAA8GR7CJR4N-RD
✅ ドロップイン✓ 在庫あり
$162 / 個
データシートを見る →HMAA8GR7DJR4N-VK 最大定格＆電気的特性
| Memory Capacity | 64 GB |
| メモリタイプ | DDR4 SDRAM |
| Module Type | 288-pin Registered DIMM (RDIMM) with ECC |
| Speed | 2666 MT/s (PC4-21300) |
| Operating Voltage | 1.2 V |
| メモリ構成 | 2Rx4 (dual rank, x4) |
| DRAM Configuration | 18 x 8Gb-class DDR4 SDRAM, FBGA |
| ECC | Yes |
| Registration | Registered (buffered) address/command/control |
| Pins | 288 |
| Form Factor | DIMM (server, 288-pin, 1.2V notch key) |
| Manufacturer | SK hynix |
HMAA8GR7DJR4N-VK standard ピン配置ガイド
HMAA8GR7DJR4N-VK (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: HMAA8GR7DJR4N-VK.
詳細は データシート をご参照ください。
主な用途
HMAA8GR7DJR4N-VK の用途: 6 件s: Enterprise Rack Server Main Memory, Virtualization Hosts, In-Memory Databases, Data Center Memory Upgrades, OEM Server Builds, High-Performance Computing Clusters.
Enterprise Rack Server Main Memory
The HMAA8GR7DJR4N-VK is a primary fit for 2-socket enterprise rack servers such as Dell PowerEdge, HPE ProLiant, and Lenovo ThinkSystem platforms that qualify DDR4-2666 RDIMMs. Its 64 GB capacity and registered architecture allow high per-channel population, letting a single server reach 512 GB or more across 8-12 DIMM slots. The 2Rx4 x4 organization enables robust ECC coverage, and the 1.2V rail keeps module power low enough for dense chassis airflow budgets. Performance consideration: in mixed-population systems the whole channel runs at the slowest module speed, so uniform -VK deployment preserves the full 2666 MT/s bus.
おすすめ
Virtualization Hosts
Hypervisor hosts benefit directly from the 64 GB capacity of the HMAA8GR7DJR4N-VK, since VM density scales with installed memory per socket. The registered DIMM design supports fully populated channels in server platforms, and the DDR4-2666 bus provides approximately 21.3 GB/s theoretical bandwidth per channel for guest workloads. ECC protects against multi-tenant memory errors that would otherwise corrupt neighboring VMs. Design note: pairing dual-rank modules like this one improves memory interleaving, typically yielding better throughput than single-rank equivalents in consolidation workloads, at the cost of slightly more restrictive population rules on some platforms.
おすすめ
In-Memory Databases
In-memory database workloads (SAP HANA-class, Redis, analytical caches) are capacity-bound, and the HMAA8GR7DJR4N-VK provides 64 GB per module to maximize memory per socket. The x4 DRAM organization combined with ECC is important for these workloads because long-running analytical queries must not silently corrupt rows; x4 enables single-device data correction in the server controller. At DDR4-2666 with dual-rank interleaving, sequential read streams sustain multi-GB/s per channel. Trade-off: latency is slightly higher than UDIMM-class parts, but registered RDIMMs are the only way to reach terabyte-scale system memory, making them mandatory for this class of application.
おすすめ
Data Center Memory Upgrades
For refreshing aging DDR4 server fleets, the HMAA8GR7DJR4N-VK is a cost-effective capacity upgrade that plugs into existing DDR4-2666 qualified slots without BIOS changes on platforms listing the -VK family. The 288-pin keyed connector and 1.2V rail match the installed base, and dual-rank topology preserves channel population rules. Because DDR4 supply is contracting as DDR5 ramps, buyers should secure stock early. Performance consideration: when upgrading an existing mixed population, verify all installed modules report the same speed grade, otherwise the memory controller down-clocks the entire system and the upgrade yields no bandwidth gain.
おすすめ
OEM Server Builds
Original equipment manufacturers building server SKUs around DDR4-2666 platforms use the HMAA8GR7DJR4N-VK as a standardized 64 GB main-memory building block. SK hynix registered DIMMs follow the JEDEC DDR4 RDIMM definition, including onboard PMIC power management and serialized presence-detect (SPD) data the BIOS uses for automatic training. For volume production, the tape-free tray-packed DIMM format simplifies automated insertion. Consideration: OEMs should validate the specific die revision ('D' in this MPN) against platform memory training firmware, as earlier 'A'-revision modules such as the HMAA8GR7AJR4N-VK are typically covered by the same QVL but should be confirmed.
おすすめ
High-Performance Computing Clusters
HPC nodes built on dual-socket DDR4 platforms use RDIMMs like the HMAA8GR7DJR4N-VK where memory bandwidth per watt matters. The 1.2V DDR4 rail and registered buffering keep power per GB low across hundreds of nodes, and the 2Rx4 configuration provides the rank interleaving that bandwidth-sensitive codes (CFD, weather modeling, genomics) rely on. At 2666 MT/s the module supports roughly 21.3 GB/s per channel of theoretical bandwidth. Design consideration: on Intel Xeon Scalable and AMD EPYC platforms, balance channels evenly with identical modules to avoid striding penalties; mixing ranks or speeds across channels degrades sustained bandwidth measurably.
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: HMAA8GR7DJR4N-VK — 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 | HMAA8GR7AJR4N-VK | HMAA8GR7CJR4N-XN | HMAA8GR7CJR4N-RD | HMA84GR7DJR4N-VK |
|---|---|---|---|---|---|
| Package | 288-pin RDIMM | 288-pin RDIMM - same | 288-pin RDIMM - same | 288-pin RDIMM - same | 288-pin RDIMM - same |
| Brand | SK hynix | SK hynix | SK hynix | SK hynix | SK hynix |
| Capacity | 64 GB | 64 GB | 64 GB | 64 GB | 32 GB |
| Speed | DDR4-2666 (PC4-21300) | DDR4-2666 | DDR4-3200 (PC4-25600) | DDR4-3200 class (C-die) | DDR4-2666 |
| Operating Voltage | 1.2 V | 1.2 V | 1.2 V | 1.2 V | 1.2 V |
| Organization | 2Rx4 | 2Rx4 | 2Rx4 | 2Rx4 | 2Rx4 |
| ECC | Yes | Yes | Yes | Yes | Yes |
| Die Generation | D-series die | A-series die | C-series die | C-series die | D-series die |
主な差別化要因
- Latest D-series die revision in the 64 GB 2666 RDIMM family （vs HMAA8GR7AJR4N-VK)
- Maximum density per slot at lowest platform cost （vs HMA84GR7DJR4N-VK)
- Lower platform qualification risk for DDR4-2666 fleets （vs HMAA8GR7CJR4N-XN)
設計ノート
Never install the HMAA8GR7DJR4N-VK in a desktop or workstation board expecting UDIMMs. Registered DIMMs are only recognized by server chipsets; installation in consumer boards results in no POST and no damage, but wasted diagnostic time. Also confirm the platform QVL lists the -VK or an equivalent 64 GB 2Rx4 DDR4-2666 RDIMM, since some older Xeon E5 v4 platforms cap at 2400 MT/s and will down-clock the module.
When populating a server with multiple HMAA8GR7DJR4N-VK modules, follow the vendor memory population rules: identical MPN, rank, and speed per channel. Mixing the -VK with faster C-series parts such as HMAA8GR7CJR4N-XN is electrically safe but forces the whole system to 2666 MT/s. Fill white-slot-first channel patterns per the server manual to preserve dual-rank interleaving benefits.
Estimated: DDR4 RDIMMs at 1.2V typically dissipate roughly 3-6 W per module under load depending on activity; in dense 24-DIMM chassis, verify inlet airflow meets the server vendor specification for fully populated channels. SK hynix RDIMMs include optional thermal sensor support read by BMC for proactive throttling; do not disable platform fan curves tied to DIMM temperature sensors.
コンプライアンス情報
Server DDR4 RDIMMs of this generation are generally lead-free, but RoHS/REACH statements were not present in the provided verified data; verify with SK hynix product environmental reports.
