• HPE P64709-B21 128GB DDR5-5600 RDIMM green circuit board with gold contacts
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HPE

HPE P64988-B21 | 128GB (1x128GB) DDR5-6400 RDIMM 2Rx4 CL52 ECC (EC8) Registered

P64988-B21

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Description

Ultra‑high‑capacity DDR5 Smart Memory for HPE server platforms, providing 6400 MT/s performance, dual‑rank x4 organization, and ECC Registered reliability for dense virtualization, HCI, and large in‑memory datasets.

Features

Massive 128GB capacity per DIMM for high consolidation
- 6400 MT/s throughput for bandwidth‑intensive workloads
- ECC Registered design for data integrity
- 2Rx4 architecture for consistent performance at scale
- Qualified Smart Memory for predictable operation

Warranty

All products sold by XS Network Tech include a 12-month warranty on both new and used items. Our in-house technical team thoroughly tests used hardware prior to sale to ensure enterprise-grade reliability.

All technical data should be verified on the manufacturer data sheets.

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Technical Specifications

FAQs

Technical Specifications

Capacity: 128GB (1x128GB)
- Memory type: DDR5 RDIMM, ECC Registered
- Speed: 6400 MT/s (PC5-6400B-R)
- Rank / organization: Dual Rank (2Rx4)
- CAS latency: 52-52-52 (CL52)
- Form factor: 288‑pin RDIMM
- Technology: Smart Memory, EC8
- Use case: Memory‑dense enterprise and virtualization environments

FAQs

Q: Will 128GB RDIMMs run at 6400 MT/s in all configurations?
A: Actual speed depends on CPU, motherboard support, and population rules. Populate per the server guidelines to achieve rated speeds.

Q: Is this ECC Registered (RDIMM) or LRDIMM?
A: This is ECC Registered (RDIMM). Do not mix RDIMMs with LRDIMMs in the same system.

Q: Can I combine these with smaller DDR5 RDIMMs?
A: Mixing capacities is possible but may affect channel balance and performance. Match capacities and ranks per channel for optimal results.

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