P28221‑B21 Specifications
HPE 32 GB DDR4‑2666 RDIMM ECC Memory Module
Manufacturer: HPE / Hewlett Packard Enterprise
Manufacturer Model: P28221‑B21
Product Line: HPE SmartMemory / Server Memory Modules
Product Series: DDR4 RDIMM
Product Type: Internal System Memory (RAM)
Product Name: HPE 32 GB DDR4‑2666 ECC Registered DIMM
KEY FEATURES:
Storage Capacity: 32 GB
Memory Type: DDR4 SDRAM
Interface / Standard: DDR4‑2666 (PC4‑21300)
Form Factor: 288‑pin DIMM (Registered / RDIMM)
Voltage: 1.20 V
Error Correction: ECC (Error‑Correcting Code)
Signal Processing: Registered (Buffered)
Rank / Organization: Dual‑Rank ×4 (2Rx4)
Compatibility: Designed for HPE servers and enterprise‑class systems supporting DDR4‑2666 ECC RDIMM memory
PERFORMANCE:
Memory Speed: 2666 MHz
CAS Latency: CL19
Maximum Theoretical Bandwidth: ~21.3 GB/s (PC4‑21300)
Random Read/Write IOPS: Not explicitly specified
Sequential Read Speed: Not explicitly specified
Sequential Write Speed: Not explicitly specified
ENVIRONMENTAL & RELIABILITY:
Operating Temperature Range: Not explicitly specified
Storage Temperature Range: Not explicitly specified
Operating Humidity: Not explicitly specified
Shock Resistance: Not explicitly specified
Vibration Resistance: Not explicitly specified
Features Supported: ECC error correction, registered buffering — optimized for server workload reliability and data integrity
PHYSICAL:
Form Factor: 288‑pin RDIMM DIMM
Number of Pins: 288
Typical Dimensions: Standard server‑class DIMM length (~133 mm)
Weight: Not explicitly specified
Color / PCB: Standard green PCB with memory chips

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