HMA84GR7CJR4N-RD - 32GB DDR4-2933 ECC RDIMM | SK hynix
MPN: HMA84GR7CJR4N-RD ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $479.65 | $479.65 |
| 10 | $465 | $4,650.00 |
| 100 | $448 | $44,800.00 |
| 500 | $432 | $216,000.00 |
| 1,000 | $419 | $419,000.00 |
Drop-in alternatives for HMA84GR7CJR4N-RD — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
HMA84GR7CJR4N-WM
✅ Drop-In✓ In Stock
$69 / Unit
View Datasheet →HMA84GR7CJR4N-PB
✅ Drop-In✓ In Stock
$129 / Unit
View Datasheet →HMA84GR7CJR4N-XN
✅ Drop-In✓ In Stock
$383.72 / Unit
View Datasheet →HMA84GR7CJR4N-VK
✅ Drop-In📋 Reference alternative (not in catalog)
HMA84GR7CJR4N-VKT3
✅ Drop-In📋 Reference alternative (not in catalog)
HMA84GR7CJR4N-RD Maximum Ratings & Electrical Characteristics
| Memory Capacity | 32 GB |
| Memory Type | DDR4 SDRAM RDIMM (Registered, ECC) |
| Data Rate | 2933 Mbps (PC4-23466R) |
| Organization | 4G x 72 |
| Rank | Dual Rank (2Rx4) |
| DRAM Density per Device | 8Gb C-die |
| DRAM Package | FBGA 78-ball, x4 organization |
| Operating Voltage | 1.2 V |
| Pin Count | 288 |
| Form Factor | 288-pin DIMM, 30 mm height |
| ECC | Yes (Error Correcting Code) |
| Registration | Registered (buffered address/command) |
| Bandwidth | 23466 MB/s per module |
| Compliance | JEDEC DDR4 RDIMM standard |
| RoHS Status | Compliant |
HMA84GR7CJR4N-RD fbga 78-ball, x4 organization Pin Configuration Guide
Complete pinout information for HMA84GR7CJR4N-RD (fbga 78-ball, x4 organization package) with 288 pins. 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 HMA84GR7CJR4N-RD.
Refer to the datasheet for full pin configuration.
Estimated pin count: 288 pins (digital package)
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
HMA84GR7CJR4N-RD is suitable for 6 applications: Enterprise Server Memory Upgrade, Virtualization Hosts, Database Servers, OEM Server Configurations (HPE/Dell), Storage Controllers and Appliances, High-Memory Workstations.
Enterprise Server Memory Upgrade
The HMA84GR7CJR4N-RD fits HPE ProLiant Gen10 Plus, Dell PowerEdge, and comparable dual-socket servers that accept DDR4-2933 ECC RDIMMs. Its registered architecture buffers address/command lines so up to 12 or more DIMMs per system can be populated without overloading the memory controller, while the 4G x 72 organization with x4 devices enables Single Device Data Correction for maximum uptime. At 23466 MB/s per module, mixed workloads gain headroom versus 2666 Mbps RDIMMs. Servers auto-derate to the slowest module in a channel, so populate matched modules per the OEM population table to hold the full 2933 Mbps bus speed.
Recommended
Virtualization Hosts
Hypervisor hosts (VMware ESXi, KVM, Hyper-V) benefit directly from the 32GB density and 2Rx4 dual-rank interleaving of the HMA84GR7CJR4N-RD: populating 12 slots yields 384GB per server, enough to oversubscribe dozens of VMs. The ECC Registered design corrects single-bit errors transparently and, with x4 device organization, tolerates an entire failed DRAM device through SDDC - critical for multi-week VM uptime. Its 2933 Mbps rate improves memory-intensive consolidation ratios over 2666 Mbps modules by roughly 10% bandwidth. Match ranks and speeds across channels per the platform QVL to avoid derating during POST training.
Recommended
Database Servers
In-memory and buffer-pool databases (SAP HANA-class workloads, Oracle, SQL Server) are latency- and bandwidth-bound, so the HMA84GR7CJR4N-RD's 2933 Mbps data rate and dual-rank interleaving measurably raise effective bandwidth per channel versus single-rank or 2666 Mbps modules. The 72-bit ECC bus plus x4 device organization provides the error containment databases demand - single-bit errors are corrected in-line, and full device failures are flagged for hot-spare/patrol scrub routines. At 32GB per DIMM, large buffer pools can be built without exhausting slots, leaving expansion headroom as the working set grows.
Recommended
OEM Server Configurations (HPE/Dell)
SK hynix RDIMM family members are resold by server OEMs under their own part numbers - for example, the HMA84GR7CJR4N-XN maps to HPE P07646-B21 in ProLiant DL345/DL360/DL365 Gen10 Plus and Apollo 6500 Gen10 Plus configurations. The HMA84GR7CJR4N-RD serves the same OEM BOM role at the 2933 Mbps validated speed. Using the original SK hynix MPN guarantees JEDEC-compliant timing tables, SPD data, and 8Gb C-die quality that OEM-qualified lists were validated against, eliminating the firmware-training surprises sometimes seen with third-party modules in locked-down server BIOSes.
Recommended
Storage Controllers and Appliances
Enterprise storage arrays, RAID controllers, and all-flash appliances use ECC Registered DDR4 as controller cache and metadata memory. The HMA84GR7CJR4N-RD's 72-bit ECC bus with x4 devices provides the SDDC fault containment storage firmware expects before battery-backed cache flush, while its 2933 Mbps rate shortens metadata lookups versus 2666 Mbps modules. Registered buffering is mandatory because storage controllers drive many DIMM slots from a single memory controller. RDIMM-only platforms cannot accept UDIMMs, so this module is one of the few electrically valid 32GB options for cache-slot upgrades.
Recommended
High-Memory Workstations
ECC-capable workstations (HP Z, Dell Precision, Lenovo P-series with Xeon W) that specify DDR4 RDIMM support accept the HMA84GR7CJR4N-RD for CAD, simulation, and AI-training workflows. Its 32GB capacity allows 4-module configurations of 128GB, and the 2933 Mbps rate feeds memory-hungry rendering and dataset preprocessing faster than consumer 2666 Mbps UDIMMs. The registered interface also reduces command-line loading at high population, which some workstation platforms exploit for 8-DIMM configurations. Verify the workstation's QVL supports 2933 Mbps RDIMMs; 3200-native boards can later be upgraded with the XN variant.
Recommended
Recommended Products Summary
Engineering reference data for HMA84GR7CJR4N-RD — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | HMA84GR7CJR4N-WM | HMA84GR7CJR4N-PB | HMA84GR7CJR4N-XN | HMA84GR7CJR4N-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 | 32 GB | 32 GB | 32 GB | 32 GB | 32 GB |
| Data Rate | DDR4-2933 (PC4-23466R) | DDR4-2933 (PC4-23466R) | DDR4-2933 class | DDR4-3200 (PC4-25600R) | DDR4-2666 (PC4-21300) |
| Organization / Rank | 4G x 72, 2Rx4 | 4G x 72, 2Rx4 | 4G x 72, 2Rx4 | 4G x 72, 2Rx4 | 4G x 72, 2Rx4 |
| ECC | Yes | Yes | Yes | Yes | Yes |
| Operating Voltage | 1.2 V | 1.2 V | 1.2 V | 1.2 V | 1.2 V |
| DRAM Die / Device | 8Gb C-die, FBGA 78-ball x4 | 8Gb C-die, FBGA 78-ball x4 | 8Gb C-die family | 8Gb C-die, FBGA 78-ball x4 | 8Gb C-die family |
Key Differentiators
- Highest speed in verified family at 2933 Mbps for Gen10-class platforms (vs HMA84GR7CJR4N-VK)
- Drop-in identical-speed replacement option (vs HMA84GR7CJR4N-WM)
- Forward-compatible upgrade path (vs HMA84GR7CJR4N-XN)
Design Notes
Never mix module types in one memory channel: RDIMMs (HMA84GR7CJR4N-RD) cannot be combined with LRDIMMs or UDIMMs, and most server BIOSes will refuse to POST or will lock the bus to a derated speed. When mixing speeds within the RDIMM family (e.g., RD with XN or VK), the entire channel trains to the slowest module - 2666 Mbps if a VK is present. Follow the server OEM memory population table: matched ranks, capacities, and speeds per channel preserve the full 2933 Mbps bus rate.
The 288-pin DDR4 RDIMM edge connector is keyed to prevent insertion of 240-pin DDR3 modules - do not force insertion. Handle modules by the edges and ground yourself before installation, because C-die DDR4 devices at 1.2V are sensitive to electrostatic discharge. For 30 mm-height modules, confirm chassis clearance: some dense 1U servers require VLP (very low profile) RDIMMs under 18.8 mm, and a full-height HMA84GR7CJR4N-RD may not fit under shrouds or riser cards.
Estimated: each DDR4 RDIMM draws roughly 3-5 W at 1.2V under typical load depending on access activity (based on standard DDR4 DRAM power estimation methodology, not a datasheet figure). A 24-DIMM dual-socket server can therefore budget 80-120 W for memory alone. Verify the platform VRM and airflow derating when populating all slots, and ensure chassis inlet air stays within the JEDEC module operating envelope to avoid DRAM refresh-rate throttling that reduces effective bandwidth.
Compliance Information
DDR4 RDIMM suffix coding includes lead-free/halogen process designators per SK hynix naming convention; RoHS compliance is standard for the computing RDIMM line. Reach/halogen/conflict-minerals status not stated in provided data.
