I want to flag an important correction: this module is actually UDIMM (Unbuffered), not RDIMM as implied by the title's lack of specification — the overwhelming majority of sources confirm this is HPE's "Standard Memory" (not SmartMemory/Registered), designed for entry-level DL20/ML30 Gen10 platforms rather than the broader Gen9/Gen10 fleet.

The HPE 879527-091 is a 16GB DDR4-2666 ECC Unbuffered Standard Memory module, designed for entry-level HPE ProLiant Gen10 servers (DL20 Gen10, ML30 Gen10). Featuring a 288-pin UDIMM form factor with Dual Rank x8 configuration and CL19 (CAS-19-19-19) latency at 1.2V, this module operates at PC4-21300 speed (2666MHz), providing a cost-effective way to increase memory capacity and improve multitasking capabilities for entry-level server deployments.

Key Features & Benefits

• DDR4-2666 (PC4-21300) Performance: Operates at 2666MHz with CL19 (19-19-19) latency, providing a significant boost in memory bandwidth for demanding applications.
• ECC Unbuffered (UDIMM) Architecture: Important distinction from Registered (RDIMM) memory — this Standard Memory module uses unbuffered signal processing, offering lower latency suited for entry-level server platforms.
• Dual Rank x8 Configuration: Features a dual-rank, x8 organization, ensuring efficient data access and overall system stability.
• Entry-Level Gen10 Platform Specificity: Specifically designed for HPE ProLiant DL20 Gen10 and ML30 Gen10 platforms — a narrower compatibility scope than HPE's SmartMemory RDIMM line used in larger Gen9/Gen10 servers.
• Cost-Effective Capacity Upgrade: Provides a cost-effective way to increase server memory capacity, improving multitasking capabilities and overall system performance for entry-level workloads.
• Broad Part Number Cross-Compatibility: Interchangeable with related part numbers 879507-B21 (Option) and P06773-001 (Spare), simplifying sourcing and inventory matching.

Technical Specifications