HPE 128GB DDR4-2666 ECC Load Reduced DIMM — 815102-B21

The HPE 815102-B21 is a 128GB DDR4-2666 (PC4-21300) ECC Load Reduced DIMM in an octal-rank 8Rx4 configuration and is the standard option kit for HPE ProLiant Gen10 servers. At 1.2V with CL19 latency across 288 pins, it delivers the highest per-slot DDR4-2666 density available for Gen10 memory-intensive enterprise workloads.

Key Features

• 128GB DDR4-2666 LRDIMM option kit — highest per-slot density for Gen10 ProLiant platforms
• 2666MHz (PC4-21300) with load-reduced buffer enabling octal-rank 8Rx4 configuration
• Standard option kit procurement for HPE ProLiant Gen10 maximum-capacity memory builds
• 1.2V efficient operation with full ECC protection across 288-pin DDR4 interface

Product Specifications

• Part Number: 815102-B21
• Manufacturer: HPE
• Capacity: 128GB
• Type: DDR4 ECC Load Reduced (LRDIMM)
• Speed: 2666MHz (PC4-21300)
• CAS Latency: CL19
• Voltage: 1.2V
• Ranks x Width: 8Rx4
• Pins: 288-pin

Memory Specifications

• Memory Standard: JEDEC DDR4-2666
• Error Correction: ECC (Error Correcting Code)
• Buffer Type: Load Reduced (LRDIMM)
• DRAM Generation: DDR4

Performance Specifications

• Peak Bandwidth: ~42.7 GB/s (PC4-21300)
• ECC Type: Single-bit error correction, multi-bit error detection
• RAS Features: Advanced ECC, rank sparing, memory mirroring (platform dependent)

Use Cases

• HPE ProLiant Gen10 maximum-memory configurations using 128GB LRDIMM per slot
• SAP HANA, Oracle IMDB, and large-scale in-memory analytics on Gen10 Xeon Scalable
• High-density VMware ESXi and Hyper-V virtualization with maximum VM density per host
• HPC memory-bound workloads benefiting from maximum DDR4-2666 capacity per server

Compatibility

• HPE ProLiant DL380 Gen10, DL560 Gen10, DL580 Gen10
• HPE ProLiant BL460c Gen10 and LRDIMM-capable Gen10 platforms
• Intel Xeon Scalable 1st/2nd Generation (Skylake-SP / Cascade Lake-SP) supporting DDR4-2666 LRDIMM

Frequently Asked Questions

Is 815102-B21 interchangeable with 850883-001?

Yes — 815102-B21 is the option kit and 850883-001 is the spare part. Both are HPE 128GB DDR4-2666 8Rx4 ECC LRDIMM modules — functionally interchangeable in supported Gen10 configurations.

What is the maximum memory capacity in a DL580 Gen10 using 815102-B21?

The DL580 Gen10 supports up to 48 DIMM slots across 4 sockets. At 128GB per slot, theoretical maximum capacity is 6TB. Consult HPE ProLiant DL580 Gen10 QuickSpecs for validated LRDIMM population rules.

What happens if I install 815102-B21 LRDIMMs alongside RDIMMs in the same server?

Mixing LRDIMM and RDIMM types in the same server is not supported and will result in memory training failures or system instability. All DIMMs must be the same type across all channels.

The HPE 815102-B21 128GB DDR4-2666 LRDIMM option kit delivers maximum per-slot memory density for HPE ProLiant Gen10 deployments. Order today — in stock at the best price with fast shipping.