Q: What is the RAM requirement to activate Intel TDX on OpenMetal bare metal servers?
Activating Intel TDX on OpenMetal bare metal servers requires a minimum of 1TB of installed RAM and at least 8 DIMMs per CPU socket, evenly distributed across memory channels.
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The minimum RAM requirement exists because TDX reserves a portion of physical memory for the Trust Domain Management Module (TDMM) — the CPU-resident component that manages trust domain creation, isolation, and attestation. The TDMM reservation scales with total installed RAM and requires sufficient capacity to operate alongside production workloads.
OpenMetal servers that meet these requirements at base configuration ship with TDX enabled by default: the XL v4, XL v4 High Frequency, and XXL v4 (v4 generation) and the XL v5 (v5 generation). For servers below 1TB at base — the Large v4 and Medium v4 — TDX can be activated after a RAM upgrade that brings total memory to the 1TB threshold. BIOS configuration is required to enable TDX after the hardware threshold is met.
Contact OpenMetal for RAM upgrade availability and TDX activation assistance for Large v4 and Medium v4 servers.
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