HMA84GR7DJR4N-VK - 32GB DDR4-2666 ECC RDIMM | SK hynix
MPN: HMA84GR7DJR4N-VK β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $195 | $195.00 |
| 10 | $188 | $1,880.00 |
| 100 | $179 | $17,900.00 |
| 500 | $172 | $86,000.00 |
| 1,000 | $165 | $165,000.00 |
Drop-in alternatives for HMA84GR7DJR4N-VK β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
HMA84GR7JJR4N-VK
β Drop-Inπ Reference alternative (not in catalog)
HMA84GR7CJR4N-VK
β Drop-Inπ Reference alternative (not in catalog)
HMA84GR7AFR4N-VK
β Drop-Inπ Reference alternative (not in catalog)
HMA84GR7CJR4N-UH
β Drop-In β οΈ εζ°εΎ ιͺθ―β In Stock
$44 / Unit
View Datasheet βHMA84GR7DJR4N-XN
β Drop-Inπ Reference alternative (not in catalog)
HMA84GR7DJR4N-VK Maximum Ratings & Electrical Characteristics
| Memory Capacity | 32 GB |
| Memory Technology | DDR4 SDRAM |
| Module Type | ECC Registered DIMM (RDIMM) |
| Speed | DDR4-2666 (PC4-21300) |
| Operating Voltage | 1.2 V |
| Organization | 4G x 72 |
| Configuration | 2Rx4 (dual rank, x4) |
| Number of DRAMs | 36 x flip-chip SDP 2Gx4 |
| Form Factor | 288-pin DIMM |
| ECC | Yes (registered with ECC) |
| Data Width | 72-bit (64 data + 8 ECC) |
| Speed Bins in Family | UH/VK/WM/XN |
| Rank | Dual rank |
| RoHS Status | Compliant (Environmentally Friendly: Yes per Partstack) |
HMA84GR7DJR4N-VK standard Pin Configuration Guide
Complete pinout information for HMA84GR7DJR4N-VK (standard package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for HMA84GR7DJR4N-VK.
Refer to the datasheet for full pin configuration.
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this digital IC. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
HMA84GR7DJR4N-VK is suitable for 6 applications: Dell PowerEdge Server Memory, Virtualization Hosts, Database and In-Memory Analytics, Workstation Memory Upgrades, Data Center Capacity Expansion, Network Appliance and Storage Nodes.
Dell PowerEdge Server Memory
The HMA84GR7DJR4N-VK is cross-referenced by Dell (part SNPTN78YC/32G) for PowerEdge C6420, C6520, C6525, and FC640 servers, making it a validated 32GB-per-DIMM upgrade for these platforms. Its DDR4-2666 speed and registered ECC architecture match the memory controller requirements of these Intel Xeon Scalable systems, and the 72-bit ECC path corrects single-bit errors to protect long-running virtualization and database workloads. Installing at 2666 MT/s with dual-rank x4 organization maximizes bandwidth per channel while allowing high aggregate capacity across all DIMM slots. Always populate channels in matched sets per the Dell hardware owner's manual.
Recommended
Virtualization Hosts
Hypervisor hosts running VMware ESXi or KVM benefit directly from the HMA84GR7DJR4N-VK's 32GB-per-DIMM density: a 2-socket server with 24 DIMM slots can reach 768GB using only these modules, leaving slots free for future growth. The 1.2V operation reduces memory-subsystem power versus DDR3, and on-module ECC prevents silent memory errors from corrupting co-tenant VMs. At DDR4-2666 with dual-rank x4 organization, the module provides balanced bandwidth for scheduling and I/O-heavy virtualization workloads. Mixing RDIMMs of different ranks or vendors in one channel is discouraged; use identical MPNs across a channel for deterministic RAS behavior.
Recommended
Database and In-Memory Analytics
In-memory databases such as SAP HANA-class and large OLTP/OLAP caches are constrained first by capacity and second by memory bandwidth. The HMA84GR7DJR4N-VK addresses both: 32GB density maximizes GB per slot, while the DDR4-2666 PC4-21300 interface with dual-rank x4 DRAM organization sustains high sequential bandwidth that x4 ranks exploit efficiently on server memory controllers. The registered, ECC-protected design meets enterprise data-integrity requirements where a single uncorrected bit error can corrupt a transaction. For scale-up deployments, populating all channels with these RDIMMs at 2666 MT/s yields predictable, JEDEC-standard timing across the full memory subsystem.
Recommended
Workstation Memory Upgrades
High-end workstations with Xeon W or Threadripper PRO platforms that support registered ECC DDR4 can use the HMA84GR7DJR4N-VK for large-memory workloads such as 3D rendering, simulation, and video editing. AliExpress product commentary confirms real-world compatibility with select workstations and performance improvements in intensive editing scenarios. The 32GB capacity per module allows 128GB+ configurations in four slots without desktop UDIMM density limits, and ECC protects multi-day render jobs from memory errors. Verify that the specific workstation chipset supports RDIMMs - consumer desktop chipsets do not, since the ECC keying prevents insertion into UDIMM-only slots.
Recommended
Data Center Capacity Expansion
When a data-center fleet needs memory refresh or capacity expansion, the HMA84GR7DJR4N-VK offers a proven, JEDEC-standard 32GB DDR4-2666 RDIMM with broad OEM qualification (Dell cross-reference SNPTN78YC/32G among others). Its x4 DRAM organization improves memory-controller channel efficiency, and the registered interface keeps electrical loading within spec at full slot population. Because DDR4 RDIMMs are standardized, mixed fleets can be homogenized onto this single MPN to simplify spares inventory. Third-party compatibility-tested equivalents (NEMIX RAM PC4-21300 RDIMM) exist for cost-sensitive refresh projects where OEM branding is not required, provided platform QVL rules are respected.
Recommended
Network Appliance and Storage Nodes
Storage controllers and network appliances built on server-class Xeon platforms use RDIMMs like the HMA84GR7DJR4N-VK to cache metadata and hot data. The 32GB density enables multi-terabyte write-back caches in 2U storage nodes, while ECC is mandatory in this role because an uncorrected cache error can corrupt filesystem metadata. The DDR4-2666 interface provides the low, sustained latency that RAID and distributed-storage control planes require, and 1.2V operation keeps thermal budgets comfortable in densely packed chassis with front-to-back airflow. Match ranks across channels and follow the appliance vendor's DIMM population table to maintain full memory-bandwidth interleaving.
Recommended
Recommended Products Summary
Engineering reference data for HMA84GR7DJR4N-VK β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | HMA84GR7JJR4N-VK | HMA84GR7CJR4N-VK | HMA84GR7DJR4N-XN | HMA84GR7CJR4N-UH |
|---|---|---|---|---|---|
| Package | 288-pin DDR4 RDIMM | 288-pin DDR4 RDIMM - same | 288-pin DDR4 RDIMM - same | 288-pin DDR4 RDIMM - same | 288-pin DDR4 RDIMM - same |
| Brand | SK hynix | SK hynix | SK hynix | SK hynix | SK hynix |
| Capacity | 32 GB | 32 GB | 32 GB | 32 GB | 32 GB |
| Data Rate | DDR4-2666 (PC4-21300) | DDR4-2666 (PC4-21300) | DDR4-2666 (PC4-21300) | DDR4-3200 (PC4-25600) | DDR4-2666, UH speed bin (derated) |
| Voltage | 1.2 V | 1.2 V | 1.2 V | 1.2 V | 1.2 V |
| Organization | 4G x 72, 2Rx4 | 4G x 72, 2Rx4 | [DATA_NEEDED] | 4G x 72, dual rank x4 | [DATA_NEEDED] |
| ECC / Registered | Yes / Yes | Yes / Yes | Yes / Yes | Yes / Yes | Yes / Yes |
| DRAM Count / Type | 36 x flip-chip SDP 2Gx4 | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
Key Differentiators
- OEM-qualified for Dell PowerEdge platforms (vs NEMIX RAM PC4-21300 RDIMM)
- Efficient x4 dual-rank DRAM organization (vs HMA84GR7AFR4N-VK)
- Balanced speed/cost position within family (vs HMA84GR7DJR4N-XN)
Design Notes
Never mix RDIMMs with UDIMMs or LRDIMMs in the same channel - the memory controller supports only one module type per platform configuration, and mixing will prevent boot or force severe downclocking. The ECC keying notch on this 288-pin module physically prevents insertion into desktop UDIMM slots. Populate DIMM slots in matched sets (same MPN, same rank) per the server hardware owner's manual to maintain interleaving and validated RAS behavior.
The HMA84GR7DJR4N-VK operates at 1.2V per the SK hynix datasheet. Estimated per-module power at DDR4-2666 for a 32GB dual-rank RDIMM is roughly 4-6W under typical load (derived from JEDEC DDR4 current estimates, not a datasheet figure); multiply by module count when sizing server PSU and chassis thermal budgets. Verify platform BIOS supports the 2666 MT/s programming table; on 2400 MT/s-only platforms the module will downclock to the platform's maximum validated speed.
Before fleet-wide deployment, validate the module against the server vendor's qualified vendor list (QVL) - ramquote documents Dell cross-reference SNPTN78YC/32G for PowerEdge C6420/C6520/C6525/FC640, but other platforms require their own validation. SK hynix reserves the right to change DRAM die revisions within the same MPN, so mixed date codes within one channel should be avoided in validated configurations.
Compliance Information
Environmentally Friendly: Yes per Partstack listing; RoHS assumed from DDR4-era SK hynix manufacturing and eco-marking. REACH/halogen/conflict-minerals declarations not found in provided data.
