HMCG84AHBRA290N - 32GB DDR5-6400 ECC RDIMM | SK Hynix
MPN: HMCG84AHBRA290N ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $149 | $149.00 |
| 10 | $141.55 | $1,415.50 |
| 25 | $134.1 | $3,352.50 |
| 100 | $126.65 | $12,665.00 |
| 500 | $119.2 | $59,600.00 |
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View Datasheet →HMCG84AHBRA290N Maximum Ratings & Electrical Characteristics
| Capacity | 32 GB |
| Memory Type | DDR5 SDRAM |
| Module Type | 288-pin ECC Registered DIMM (RDIMM) |
| Data Rate | 6400 MT/s |
| Bandwidth | PC5-51200 (51.2 GB/s peak) |
| CAS Latency | CL52 |
| Operating Voltage | 1.1 V |
| Rank | Single Rank (1Rx4) |
| Organization | x4 DRAM devices |
| Error Correction | ECC (registered, with on-die ECC) |
| Form Factor | 288-pin DIMM |
| Configuration | 1 x 32 GB (single module) |
| Use Case | Enterprise server / data center |
| Power Delivery | On-module PMIC (per JEDEC DDR5) |
| Serial Presence Detect | SPD hub (5-bit, DDR5) |
HMCG84AHBRA290N enterprise server / data center Pin Configuration Guide
Complete pinout information for HMCG84AHBRA290N (enterprise server / data center 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 HMCG84AHBRA290N.
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
HMCG84AHBRA290N is suitable for 6 applications: AI Inference Servers, Edge Compute Nodes, Virtualization Hosts (Low VM Density), Cloud Compute Instances, Database Servers, Workstation and Test Platforms.
AI Inference Servers
The HMCG84AHBRA290N's 6400 MT/s data rate provides up to 51.2 GB/s of peak bandwidth per module, which directly accelerates AI inference workloads where model weights and activations stream continuously from main memory. On AMD EPYC 9004/9005 or Intel Xeon 5th/6th Gen platforms, populating all channels at 1DPC with this module maximizes aggregate bandwidth while the 1.1V rail keeps memory power in check - important because inference throughput per watt is a key data center metric. The registered ECC architecture sustains long-running, unattended inference services with on-die ECC correcting single-bit errors transparently. For capacity-limited inference nodes, 32GB modules in 8-12 channels deliver 256-384GB per socket, sufficient for quantized large-model serving.
Recommended
Edge Compute Nodes
Edge compute hosts running containerized services and local analytics benefit from the HMCG84AHBRA290N's balance of 32GB density and 6400 MT/s bandwidth. Edge servers are often thermally constrained; the module's 1.1V DDR5 operation cuts memory subsystem power roughly 30% versus equivalent-bandwidth DDR4 RDIMMs, reducing cooling load in sealed or fanless enclosures. The 1Rx4 single-rank organization minimizes electrical loading, helping signal integrity in short-trace edge motherboards and enabling rated speed at 1DPC. With on-die ECC and registered command-address path, the module maintains data integrity in environments where maintenance windows are rare, making it a strong fit for retail edge, factory-floor gateways, and telco edge micro-data-centers.
Recommended
Virtualization Hosts (Low VM Density)
For virtualization servers hosting a moderate number of VMs, the 32GB HMCG84AHBRA290N provides a capacity-per-DIMM sweet spot: enough memory for 8-16 general-purpose VMs per node while leaving DIMM slots free for later expansion. Running at 6400 MT/s with CL52 latency, it delivers responsive guest performance for web serving, CI/CD runners, and light database workloads. The ECC Registered architecture is required on virtually all EPYC and Xeon Scalable platforms - unbuffered DDR5 will not boot on these boards. A practical population strategy is 1DPC with this module to hold 6400 MT/s; migrating to 2DPC later with additional 32GB modules trades some bandwidth for doubled capacity without module replacement.
Recommended
Cloud Compute Instances
Cloud providers provisioning general-purpose instance families value the HMCG84AHBRA290N for its validated JEDEC-standard DDR5-6400 RDIMM profile, which interoperates across multi-vendor server fleets. The PC5-51200 bandwidth class supports consistent per-vCPU memory performance required by service-level agreements, while dual-vendor sourcing (SK Hynix plus Samsung or Micron equivalents) de-risks supply for large fleet builds. On-die ECC reduces effective DRAM error exposure across thousands of host-hours, lowering uncorrected-error-driven VM resets. Because DDR5 modules carry on-module PMIC power management, fleet-level power telemetry per DIMM becomes possible, aiding capacity planning and thermal optimization in dense hyperscale racks.
Recommended
Database Servers
High-performance database servers - in-memory analytic engines, Redis/Memcached tiers, and OLTP systems with large buffer pools - are bandwidth and capacity hungry. The HMCG84AHBRA290N contributes 51.2 GB/s per module at 6400 MT/s, and populating all memory channels with 1Rx4 modules at 1DPC maximizes per-socket bandwidth that buffer-pool scans and column-store aggregations depend on. The module's ECC Registered design is mandatory for database hosts, where a single uncorrected DRAM error can corrupt committed transactions; DDR5 on-die ECC plus server-side scrubbing substantially reduces that risk. For read-mostly analytic appliances, pairing this module across all channels typically yields near-linear bandwidth scaling.
Recommended
Workstation and Test Platforms
Engineering workstations and hardware validation benches built on server-class chipsets (EPYC 8004, Xeon W-2400/3400) use the same DDR5 RDIMM ecosystem, and the HMCG84AHBRA290N fits directly. Its 6400 MT/s capability lets validation teams exercise memory controllers at maximum JEDEC speed for signal-integrity and BIOS memory-training testing, while 32GB single-rank population simplifies rank-mapping test matrices. The SPD hub exposes full module timing data to host tools, supporting automated qualification scripts. For labs comparing SK Hynix against Samsung or Micron modules on a common platform, this module serves as the SK Hynix reference unit in the 32GB DDR5-6400 RDIMM class.
Recommended
Recommended Products Summary
Engineering reference data for HMCG84AHBRA290N — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | HMCG84AHBRA478N | HMCG84MEBRA107N | HMCG78AHBRA471N |
|---|---|---|---|---|
| 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 | SK Hynix |
| Capacity | 32 GB | 32 GB | 32 GB | 32 GB |
| Data Rate | 6400 MT/s | 6400 MT/s (family) | 5600 MT/s (family) | 5600 MT/s (family) |
| Bandwidth Class | PC5-51200 | PC5-51200 class | PC5-44800 class | PC5-44800 |
| CAS Latency | CL52 | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
| Operating Voltage | 1.1 V | 1.1 V | 1.1 V | 1.1 V |
| Rank / Organization | 1Rx4 | [DATA_NEEDED] | [DATA_NEEDED] | 1Rx4 (family) |
| ECC Registered | Yes | Yes | Yes | Yes |
Key Differentiators
- Top JEDEC speed grade in the HMCG family (vs HMCG78AHBRA471N)
- Single-rank 1Rx4 organization (vs Dual-rank 32GB DDR5 RDIMMs)
- 1.1V DDR5 power efficiency (vs Comparable DDR4-3200 RDIMMs)
Design Notes
Verify platform QVL and speed support before purchase. DDR5-6400 operation on the HMCG84AHBRA290N typically requires one DIMM per channel (1DPC); populating 2DPC on most EPYC 9004 and Xeon platforms downclocks the channel to 5600 MT/s or lower. Mixing speed grades across channels forces ALL installed modules to run at the slowest common speed, so keep uniform 6400-grade modules per system when maximum bandwidth matters.
The 288-pin DDR5 DIMM slot is mechanically incompatible with DDR4 (288-pin but different key notch position) - do not attempt insertion. Ensure the chassis provides adequate airflow across DIMMs: DDR5 PMICs move heat generation onto the module itself (versus DDR4 where VDD was fed from the board), so Dense-DIMM configurations (12-24 modules per node) can raise local inlet temperatures 5-10C, requiring revised fan curves.
Estimated: a 32GB DDR5-6400 RDIMM at 1.1V draws roughly 5-8W under load including PMIC overhead. For a 24-DIMM dual-socket server, budget approximately 150-200W for the memory subsystem when sizing PSU headroom and cooling. Unlike DDR4, per-module PMIC power telemetry is exposed via the SPD hub, enabling runtime per-DIMM power monitoring in supported BMCs.
Compliance Information
Compliance declarations were not present in the verified web data. SK Hynix enterprise DDR5 modules are typically RoHS-compliant; request the manufacturer's material declaration from your distributor.
