HMA84GR7CJR4N-XN - 32GB DDR4-3200 ECC RDIMM | SK hynix
MPN: HMA84GR7CJR4N-XN β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $479.65 | $479.65 |
| 10 | $455.67 | $4,556.70 |
| 100 | $431.69 | $43,169.00 |
| 500 | $407.7 | $203,850.00 |
| 1,000 | $383.72 | $383,720.00 |
Drop-in alternatives for HMA84GR7CJR4N-XN 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:
HMA84GR7DJR4N-XN
β Drop-Inπ Reference alternative (not in catalog)
HMA84GR7CJR4N-WM
β Drop-Inβ In Stock
$69 / Unit
View Datasheet βM393A4K40CB2-CWE
β Drop-Inπ Reference alternative (not in catalog)
M393A4K40EB3-CWE
β Drop-Inπ Reference alternative (not in catalog)
MTA36ASF4G72PZ-3G2
β Drop-Inπ Reference alternative (not in catalog)
HMAA8GR7CJR4N-RD
β Drop-Inβ In Stock
$162 / Unit
View Datasheet βHMA84GR7CJR4N-XN Maximum Ratings & Electrical Characteristics
| Memory Capacity | 32 GB |
| Memory Type | DDR4 SDRAM RDIMM |
| Data Rate | 3200 MT/s (PC4-25600) |
| CAS Latency | CL22 |
| ECC | Yes (Error Correcting Code) |
| Registration | Registered (buffered address/command) |
| Organization | 4G x 72 (2Rx4, dual rank) |
| DRAM Configuration | 36 x FBGA (78-ball) 2G x 4 DRAM |
| Supply Voltage | 1.2 V nominal |
| Maximum Supply Voltage | 1.26 V |
| Pins | 288 |
| Package Code | DIMM (rectangular) |
| Mounting Type | Slot-in DIMM connector |
| Number of Terminals | 288 |
| Rank | Dual rank (2R) |
| Data Width | x4 |
| Temperature Grade | OTHER (per distributor data) |
HMA84GR7CJR4N-XN dimm (rectangular) Pin Configuration Guide
Complete pinout information for HMA84GR7CJR4N-XN (dimm (rectangular) 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-XN.
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-XN is suitable for 6 applications: HPE ProLiant Gen10 Plus Server Memory Upgrade, Dell PowerEdge Server Expansion, Virtualization and Low-VM-Density Hosts, Edge Compute and Compact Server Nodes, General-Purpose Database and Application Servers, Fleet Standardization and Spare-Pool Management.
HPE ProLiant Gen10 Plus Server Memory Upgrade
The HMA84GR7CJR4N-XN is validated through HPE's own cross-reference (part P07646-B21) for HPE ProLiant DL360 Gen10 Plus, DL345 Gen10 Plus, DL365 Gen10 Plus, and HPE Apollo 6500 Gen10 Plus (XL675d) platforms. Its 32GB DDR4-3200 PC4-25600 configuration with ECC registered buffering matches the memory controller requirements of these two-socket Intel Xeon Scalable servers, and CL22 latency ensures JEDEC-standard timing compatibility. Because the module is dual-rank x4, it balances rank interleaving for steady bandwidth under virtualization loads. When populating 8 or more DIMMs per system, install identical 32GB modules per channel to maintain rated 3200 MT/s speed; mixed-speed populations cause all channels to down-clock to the slowest module, a common cause of underperforming Gen10 Plus deployments.
Recommended
Dell PowerEdge Server Expansion
Dell OEM part numbers 370-AEVN and SNP75X1VC32G are listed in distributor cross-reference data as alternatives to HMA84GR7CJR4N-XN, confirming its use in Dell PowerEdge platforms that accept 32GB DDR4-3200 ECC RDIMMs. The 288-pin registered architecture buffers address/command lines, which is mandatory for Dell servers with 16 or more DIMM slots where unbuffered UDIMMs cannot drive the bus reliably. The 4G x 72 organization provides 64-bit data plus 8-bit ECC, allowing the memory controller to correct single-bit errors on the fly - critical for PowerEdge systems running hypervisors where an uncorrected error would crash multiple VMs simultaneously. Populate DIMM slots in Dell's recommended white/black slot order and keep rank counts balanced per channel for optimal memory bandwidth.
Recommended
Virtualization and Low-VM-Density Hosts
For edge compute and low-VM-density virtualization hosts, 32GB per DIMM strikes the cost-to-capacity sweet spot: filling 8 channels with HMA84GR7CJR4N-XN yields 256GB per server without requiring more expensive 64GB or 128GB modules. The DDR4-3200 data rate delivers 25.6 GB/s per channel of theoretical bandwidth, and dual-rank organization improves effective bandwidth by 5-15% over single-rank modules in stream and memory-latency-sensitive hypervisor workloads due to rank interleaving. ECC protection corrects single-bit errors transparently, preventing silent data corruption in long-running VMs. Keep channels symmetrically populated (one module per channel before adding a second per channel) so the memory controller can engage all ranks evenly at full 3200 MT/s speed.
Recommended
Edge Compute and Compact Server Nodes
Edge compute nodes at branch offices and industrial sites benefit from the HMA84GR7CJR4N-XN's proven reliability and modest power draw. At 1.2V nominal, each 32GB module consumes roughly 3-5W typical, keeping the total memory power budget of an 8-DIMM edge server under 40W - important for fanless or constrained-cooling enclosures. The x4 DRAM organization with ECC provides chipkill-class resilience when the platform supports it, valuable in remote sites where physical service visits are costly and memory errors must not take the node down. The module's standard 288-pin RDIMM form factor fits short-depth and millisecond-serviceable edge platforms from every major OEM, and its JEDEC-standard SPD allows hot enumeration by any DDR4 BMC without custom firmware support.
Recommended
General-Purpose Database and Application Servers
General-purpose database and application servers running SQL, PostgreSQL, or in-memory caches rely on large, reliable DRAM pools. A dual-socket server populated with 12-16 HMA84GR7CJR4N-XN modules delivers 384-512GB with 3200 MT/s access across all channels, reducing query latency for working sets that fit in memory. The CL22-22-22 JEDEC timing profile at 1.2V provides stable operation under sustained load without exotic cooling; the registered buffer keeps signal integrity intact across long traces in 2U chassis with 24 DIMM slots. ECC matters here because database engines like PostgreSQL assume memory returns correct data - single-bit errors corrected by ECC never surface to the application, whereas on non-ECC desktop memory they would silently corrupt indexes or rows.
Recommended
Fleet Standardization and Spare-Pool Management
IT operations teams standardizing memory fleets prefer a single validated SKU per platform generation. HMA84GR7CJR4N-XN serves this role for DDR4 Gen10/Gen14-class servers because OEM-validated cross-references (HPE P07646-B21, Dell 370-AEVN, Samsung M393A4K40CB2-CWE, Micron MTA36ASF4G72PZ-3G2) all map to the same functional envelope: 32GB, PC4-25600, 2Rx4, ECC registered, 288-pin. Standardizing on one capacity and rank configuration simplifies spare inventory (any spare fits any slot), avoids mixed-rank channel imbalance, and makes RMA diagnosis faster since all modules present identical SPD data to the BMC. When DDR4 supply tightens, the validated Samsung and Micron equivalents can fill orders without re-qualification on most server platforms that accept standard RDIMMs.
Recommended
Recommended Products Summary
Engineering reference data for HMA84GR7CJR4N-XN β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | HMA84GR7DJR4N-XN | HMA84GR7CJR4N-WM | M393A4K40CB2-CWE | MTA36ASF4G72PZ-3G2 | HMAA8GR7CJR4N-RD |
|---|---|---|---|---|---|---|
| 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 | 288-pin DDR4 RDIMM - same |
| Brand | SK hynix | SK hynix | SK hynix | Samsung | Micron | SK hynix |
| Capacity | 32 GB | 32 GB | 32 GB | 32 GB | 32 GB | 64 GB |
| Data Rate | 3200 MT/s (PC4-25600) | 3200 MT/s (PC4-25600) | 2933 MT/s (PC4-23466) | 3200 MT/s (PC4-25600) | 3200 MT/s (PC4-25600) | 3200 MT/s (PC4-25600) |
| CAS Latency | CL22 | CL22 | CL21 | CL22 | CL22 | CL22 |
| Rank / Organization | 2Rx4 (dual rank, x4) | 2Rx4 | 2Rx4 | 2Rx4 | 2Rx4 | 2Rx4 |
| Supply Voltage | 1.2 V (max 1.26 V) | 1.2 V | 1.2 V | 1.2 V | 1.2 V | 1.2 V |
| ECC / Registration | ECC Registered (RDIMM) | ECC Registered | ECC Registered | ECC Registered | ECC Registered | ECC Registered |
| OEM Cross-References | HPE P07646-B21, Dell 370-AEVN | [DATA_NEEDED] | [DATA_NEEDED] | Listed as alternative P/N (InsideSystems) | Listed as alternative P/N (InsideSystems) | HPE P07650-B21 (RAMQuote) |
Key Differentiators
- Full DDR4-3200 speed bin in the SK hynix 32GB RDIMM family (vs HMA84GR7CJR4N-WM)
- Same-brand newest-die drop-in with identical ratings (vs HMA84GR7DJR4N-XN)
- Validated OEM cross-references reduce qualification cost (vs MTA36ASF4G72PZ-3G2)
- Lower capacity per module than 64GB sibling (vs HMAA8GR7CJR4N-RD)
Design Notes
Never mix 3200 MT/s (XN) and 2933 MT/s (WM) modules in the same server if rated speed matters: DDR4 platforms run all channels at the speed of the slowest installed module. A single WM module in an otherwise all-XN system down-clocks the entire memory subsystem by ~9%. Also avoid mixing x4 and x8 organizations across channels - rank interleaving efficiency and error-handling behavior differ, and some OEM BIOSes flag the configuration as unsupported.
Although DIMMs slot into standard connectors, ensure the server chassis airflow path passes over the DIMM banks. RDIMMs dissipate roughly 3-5W each at DDR4-3200, and 24 populated modules can add over 80W of heat in a 2U chassis. Follow the OEM thermal population order (usually alternating slots first) so DRAM sensors do not throttle the memory bus during summer ambient peaks above 35C inlet temperature.
DDR4 RDIMMs operate at 1.2V nominal with 1.26V absolute maximum per distributor data. Do not attempt consumer-style memory overclocking (raising VDD) in server RDIMM platforms - registered buffers and server memory controllers are specified only at JEDEC voltage, and out-of-spec operation voids RMA coverage and risks data corruption in ECC-enabled systems.
The registered (buffered) architecture of this RDIMM is mandatory for heavily populated servers. Substituting an unbuffered 32GB UDIMM in an RDIMM-only slot either fails to boot or causes marginal signal integrity at the memory controller. Conversely, do not mix LRDIMMs (load-reduced) with RDIMMs on the same channel; JEDEC requires homogeneous module types per channel.
Compliance Information
Compliance data not stated in the provided web sources. SK hynix server DRAM modules are typically RoHS compliant, but this must be confirmed against the official datasheet or SK hynix product page before claiming compliance.
