OpenMetal Large v5 Memory Bandwidth

Q: What is the memory bandwidth of the OpenMetal Large v5 with DDR5-6400?

The Large v5 delivers approximately 819 GB/s of aggregate memory bandwidth — 512 GB of DDR5-6400 across 8 channels per socket on dual Xeon 6517P processors, a 23% increase over the Large v4’s DDR5-5200 configuration.

See Large v5 specs

Each Xeon 6517P provides 8 DDR5 memory channels, and the Large v5 ships with 8 of 16 DIMM slots populated to reach the 512 GB baseline — one DIMM per channel for full bandwidth utilization. At 6,400 MT/s, each channel delivers approximately 51.2 GB/s; with 8 channels per processor and two processors, aggregate bandwidth approaches 819 GB/s. ECC is standard across all OpenMetal configurations, which is required for production database, financial system, and HIPAA-eligible deployments.

That bandwidth shows up most clearly in memory-throughput-bound workloads. In-memory databases that scan large datasets (Redis, PostgreSQL shared buffer scans, in-memory ClickHouse aggregations) saturate DRAM bandwidth on hot queries; the v5’s 23% improvement over the v4 translates directly to per-query throughput on those paths. Virtual machine workloads competing for the memory bus in Proxmox, KVM, or OpenStack environments see lower memory-bus contention as VM density grows. Vectorized compute paths that move large batches of data through AVX-512 also benefit from the higher sustained bandwidth.

The 8 open DIMM slots provide a clear upgrade path. Doubling the configuration to 1 TB activates Intel TDX support on the Xeon 6517P (TDX requires all DIMM slots populated on Large-tier servers per OpenMetal policy) and roughly maintains bandwidth scaling since channels remain fully populated. Customers planning to grow into 1 TB workloads or enable confidential computing later can deploy at 512 GB now and upgrade in-place without replacing existing memory modules. Contact OpenMetal to schedule RAM upgrades on deployed Large v5 servers.