HMA84GR7CJR4N-WM - 32GB DDR4-2933 ECC RDIMM | SK hynix | Server
MPN: HMA84GR7CJR4N-WM ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $89 | $89.00 |
| 10 | $85 | $850.00 |
| 100 | $79 | $7,900.00 |
| 500 | $74 | $37,000.00 |
| 1,000 | $69 | $69,000.00 |
Drop-in alternatives for HMA84GR7CJR4N-WM — 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-UH
✅ Drop-In✓ In Stock
$44 / Unit
View Datasheet →HMA84GR7CJR4N-RD
✅ Drop-In✓ In Stock
$419 / Unit
View Datasheet →HMA84GR7CJR4N-PB
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$129 / Unit
View Datasheet →HMA84GR7DJR4N-VK
✅ Drop-In✓ In Stock
$165 / Unit
View Datasheet →HMAA8GR7CJR4N-RD
✅ Drop-In✓ In Stock
$162 / Unit
View Datasheet →M393A4K40CB2-CVF
✅ Drop-In📋 Reference alternative (not in catalog)
HMA84GR7CJR4N-WM Maximum Ratings & Electrical Characteristics
| Capacity | 32 GB |
| Memory Type | DDR4 SDRAM RDIMM (ECC Registered) |
| Data Rate | 2933 MT/s (PC4-23400) |
| Organization | 4Gx72 |
| Rank | Dual Rank (2Rx4) |
| CAS Latency | CL21 |
| Operating Voltage | 1.2 V |
| Pin Count | 288 |
| Form Factor | 288-pin DIMM (Rectangular) |
| DRAM Configuration | 36 FBGA (78-ball) DDR4 SDRAM devices |
| ECC | Yes (ECC Registered) |
| Number of Ports | 1 |
| Temperature Grade | OTHER (commercial) |
| Technology | CMOS |
| Application | Server / Workstation memory |
HMA84GR7CJR4N-WM standard Pin Configuration Guide
Complete pinout information for HMA84GR7CJR4N-WM (standard 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-WM.
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-WM is suitable for 6 applications: Dell PowerEdge Server Memory, Virtualization Hosts, Database Servers, HPE ProLiant Platform Upgrades, Edge Compute and Storage Appliances, Workstation and Test Server Builds.
Dell PowerEdge Server Memory
The HMA84GR7CJR4N-WM is directly qualified for Dell PowerEdge C6420, C6520, C6525, and FC640 platforms through Dell's own cross-reference part 99L0497-001.A00, per ramquote platform data. Its DDR4-2933 MT/s data rate matches the memory controller capability of Intel Xeon Scalable (Cascade Lake) generation servers used in these chassis, delivering full-bandwidth 2Rx4 dual-rank operation. With 32GB per module and ECC registration, a fully populated 2-socket C6520 can reach multi-TB capacities for dense compute workloads. The 1.2V operation keeps per-DIMM power within Dell thermal guidelines even at full population. Installation follows standard RDIMM population rules: fill white slots first per rank-pairing guidance, and avoid mixing with LRDIMMs in the same channel.
Recommended
Virtualization Hosts
For hypervisor hosts running VMware ESXi, Proxmox, or Hyper-V, the HMA84GR7CJR4N-WM provides 32GB of ECC-protected DDR4-2933 bandwidth per slot, which corewavelabs identifies as ideal for edge compute and low-VM-density deployments. ECC registration corrects single-bit errors that would otherwise crash running VMs, a non-negotiable requirement for consolidated workloads. The dual-rank 2Rx4 organization improves memory controller parallelism, raising effective bandwidth for multi-VM scheduling compared with single-rank modules. In a dual-socket host with 16 slots, eight of these modules yield 256GB - a common sweet spot for 2-3 VMs per core. Verify that all channels use matched speed grades so the controller runs the full 2933 MT/s rather than down-clocking to the slowest module.
Recommended
Database Servers
Database engines such as PostgreSQL, MySQL, and SQL Server benefit directly from the HMA84GR7CJR4N-WM's combination of 2933 MT/s bandwidth and large buffer capacity. The 4Gx72 organization dedicates 8 of the 72 bits to ECC, allowing the memory controller to correct single-bit errors that would otherwise corrupt index pages or query results. Dual-rank x4 construction enables stronger in-DRAM error containment than x8-based modules, which is why database qualified-vendor lists frequently specify x4 RDIMMs. In memory-intensive OLTP configurations, populating 12 channels with 32GB modules provides 384GB for buffer pools without resorting to costlier 64GB LRDIMMs. Pair modules evenly across channels to maintain interleaving and avoid unbalanced channel loading that reduces effective bandwidth below the 2933 MT/s rating.
Recommended
HPE ProLiant Platform Upgrades
SK hynix RDIMMs of this class are resold by HPE under OEM part numbers such as P07646-B21 (for the DDR4-3200 -XN sibling) and by Lenovo as 4X77A08633, per ramquote; the -WM variant likewise maps to equivalent HPE SKUs on 2933-capable ProLiant Gen10 platforms. For ProLiant DL360/DL380 Gen10 servers with Xeon Scalable memory controllers, the HMA84GR7CJR4N-WM runs at its native 2933 MT/s with full ECC registration. HPE firmware enforces qualified memory and population rules, so confirm the module appears in the server's QVL or is accepted as an OEM cross-reference before deployment. As with Dell platforms, RDIMMs cannot be mixed with LRDIMMs within a channel, and matched ranks per channel preserve performance.
Recommended
Edge Compute and Storage Appliances
Edge compute nodes and storage appliances require server-grade reliability in constrained environments where remote intervention is costly, making the HMA84GR7CJR4N-WM's ECC protection essential - a single uncorrected memory error in an unattended site can corrupt replicated data or crash a node. The 32GB per-DIMM density allows compact 1U edge servers to reach 128-256GB without high-profile LRDIMMs, preserving airflow in fanless or low-noise enclosures. DDR4-2933 with CL21 latency delivers responsive performance for local analytics, caching tiers, and software-defined storage metadata operations. Its 1.2V operation contributes to the low thermal budget typical of passively cooled edge chassis, and CMOS technology provides proven long-term reliability for always-on deployments.
Recommended
Workstation and Test Server Builds
Engineering workstations and lab test servers built on registered-memory platforms use the HMA84GR7CJR4N-WM to combine workstation-class capacity (32GB per DIMM) with ECC data integrity for simulation, compilation, and test automation. DDR4-2933 MT/s with dual-rank 2Rx4 organization sustains high sustained bandwidth for memory-bound EDA tools, CAD assemblies, and CI/CD runners. The ECC Registered architecture means the module only fits workstation boards with Xeon W, Threadripper PRO, or server chipsets - standard consumer desktops reject RDIMMs, which is the most common compatibility pitfall. For mixed laboratory fleets, the SK hynix -UH and -RD 2666 MT/s variants can be interleaved with the -WM, with the controller down-clocking all channels to the lowest common grade.
Recommended
Recommended Products Summary
Engineering reference data for HMA84GR7CJR4N-WM — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | HMA84GR7CJR4N-UH | HMA84GR7CJR4N-RD | HMA84GR7CJR4N-PB | HMA84GR7DJR4N-VK | M393A4K40CB2-CVF |
|---|---|---|---|---|---|---|
| Package | 288-pin RDIMM | 288-pin RDIMM - same | 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 | Samsung Electronics |
| Capacity | 32 GB | 32 GB | 32 GB | 32 GB | 32 GB | 32 GB |
| Data Rate | 2933 MT/s (PC4-23400) | 2666 MT/s (PC4-21300) | 2666 MT/s (PC4-21300) | 2400 MT/s (PC4-19200) | 2666 MT/s (PC4-21300) | 2933 MT/s (PC4-23400) |
| Organization / Rank | 4Gx72, 2Rx4 Dual Rank | 4Gx72, 2Rx4 | 4Gx72, 2Rx4 | 4Gx72, 2Rx4 | 4Gx72, 2Rx4 | 4Gx72, 2Rx4 |
| ECC / Registration | ECC Registered | ECC Registered | ECC Registered | ECC Registered | ECC Registered | ECC Registered |
| Operating Voltage | 1.2 V | 1.2 V | 1.2 V | 1.2 V | 1.2 V | 1.2 V |
| CAS Latency | CL21 | CL19 | CL19 | CL17 | CL19 | CL21 |
| Unit Price (qty 1, as of 2026-09-05) | $89.00 | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
Key Differentiators
- Native DDR4-2933 speed grade (vs HMA84GR7CJR4N-UH)
- Exact cross-brand equivalent available (vs M393A4K40CB2-CVF)
- Platform-qualified with OEM cross-references (vs HMA84GR7CJR4N-PB)
Design Notes
RDIMMs like the HMA84GR7CJR4N-WM cannot be mixed with LRDIMMs or UDIMMs in the same memory channel - most platforms will refuse to boot or will operate all DIMMs in a degraded fallback mode. When upgrading, match module type across the entire server. Additionally, mixing speed grades (this 2933 MT/s module with 2666 MT/s -UH or -RD siblings) is electrically safe but forces every channel to run at the slowest grade, so plan uniform populations where bandwidth matters.
Always verify the module against the server vendor's qualified vendor list (QVL) before deployment. Dell qualifies this part as 99L0497-001.A00 for PowerEdge C6420/C6520/C6525/FC640, and HPE/Lenovo resell identical SK hynix silicon under their own OEM numbers. Firmware on these platforms can reject non-qualified memory or disable channels. Follow the vendor population rules (white slots first, matched ranks per channel) to maintain interleaving and full 2933 MT/s operation.
The HMA84GR7CJR4N-WM operates at 1.2V per the DDR4 JEDEC-class standard used across all 288-pin RDIMMs. When fully populating a dual-socket server, estimated total DIMM power is dominated by per-module idle and activation current rather than speed grade, so derating the power supply for memory is rarely required below full 24-DIMM populations. Ensure chassis airflow keeps DIMM inlet temperature within the module's commercial temperature grade; sustained high inlet temperatures accelerate refresh-rate derating and error rates.
Compliance Information
Compliance status not stated in the provided verified web data; server DRAM modules of this class are typically RoHS compliant per manufacturer declarations, but this must be confirmed from the official SK hynix product page.
