HPE 16GB 2666MHz DDR4 PC4-21300 ECC Registered CL19 288-Pin Non-Volatile DIMM 1.2V Single Rank x4 Memory Module - 845264-B21

The HPE 845264-B21 is a 16GB DDR4-2666 (PC4-21300) ECC Non-Volatile DIMM (NVDIMM) in single-rank 1Rx4 configuration and is the standard option kit for HPE ProLiant Gen10 servers. Combining DRAM-speed performance with flash-backed data persistence, it enables ultra-low-latency persistent memory for transaction logs, database checkpoints, and in-memory computing workloads on Gen10 platforms.

Key Features

• 16GB DDR4-2666 NVDIMM option kit — standard procurement for Gen10 persistent memory builds
• Flash-backed non-volatile persistence retains data across power cycles and system resets
• DRAM-speed access at DDR4-2666 with persistence for ultra-low-latency storage workloads
• 1Rx4 single-rank ECC for reliable persistent memory operation in Gen10 platforms

Product Specifications

• Part Number: 845264-B21
• Manufacturer: HPE
• Capacity: 16GB
• Type: DDR4 ECC Non-Volatile DIMM (NVDIMM)
• Speed: 2666MHz (PC4-21300)
• CAS Latency: CL19
• Voltage: 1.2V
• Ranks x Width: 1Rx4
• Pins: 288-pin

Memory Specifications

• Memory Standard: JEDEC DDR4-2666
• Error Correction: ECC (single-bit correction, multi-bit detection)
• Buffer Type: Registered Non-Volatile DIMM (NVDIMM)
• Persistence: Flash-backed — retains data on power loss via BBU

Performance Specifications

• Peak Bandwidth: ~42.7 GB/s (PC4-21300) at DRAM speed with persistence
• ECC Type: Single-bit error correction, multi-bit error detection
• Persistence: Transparent flash backup — DRAM latency during normal operation

Use Cases

• HPE ProLiant Gen10 standard NVDIMM option kit for persistent memory deployments
• Database write-ahead logs and transaction journal acceleration
• In-memory computing with persistent data retention across Gen10 power cycles
• Ultra-low-latency persistent storage tier alongside standard RDIMM channels

Compatibility

• HPE ProLiant DL380 Gen10, DL360 Gen10 with NVDIMM-capable memory slots
• Intel Xeon Scalable 1st/2nd Generation (Skylake-SP / Cascade Lake-SP) with NVDIMM support
• Requires HPE NVDIMM Backup Power Module (BBU) for data persistence on power loss

Frequently Asked Questions

Is 845264-B21 interchangeable with 874540-001 and 825109-091?

Yes — 845264-B21 is the option kit, 874540-001 is the spare part, and 825109-091 is a factory/OEM variant. All are HPE 16GB DDR4-2666 ECC NVDIMM 1Rx4 — fully interchangeable in Gen10 supported configurations with the appropriate BBU.

What HPE backup power module is required for 845264-B21?

HPE NVDIMMs require an HPE NVDIMM Backup Power Module (BBU) installed in the server to enable flash persistence on power loss. Consult HPE ProLiant DL380/DL360 Gen10 QuickSpecs for the specific BBU part number required.

How many NVDIMMs can be installed in a ProLiant Gen10 server?

NVDIMM population rules vary by server model and processor configuration. HPE ProLiant Gen10 typically supports a limited number of NVDIMM slots per processor socket. Consult HPE ProLiant Gen10 QuickSpecs for maximum NVDIMM population and slot placement rules.

The HPE 845264-B21 16GB DDR4-2666 NVDIMM option kit delivers DRAM-speed persistent memory for HPE ProLiant Gen10 deployments. Get it in stock at a competitive price — order today.