https://community.intel.com/t5/Intel-Software-Guard-Extensions/Inquiry-About-Memory-Hardware-Require

[Chancie]

Dear Intel Support Team,

I am writing to clarify a technical requirement outlined in your official SGX/TDX enabling documentation. Specifically, regarding the memory population rules stated below:

“At minimum, all slot 0's of all Integrated Memory Controller (IMC) channels for all installed CPUs must be populated (i.e., 8 DIMMs per populated CPU socket, at least). DIMM population must be symmetric across IMCs.
The following figure shows possible populations per populated CPU with 8 or 16 DIMMs...”

We seek clarification on the following points:

1. DIMM Capacity Requirements:

   • Does the requirement for populating 8 or 16 DIMMs impose specific restrictions on DIMM capacity (e.g., 16GB/32GB/64GB)?

     • For example, is it permissible to use mixed-capacity DIMMs (e.g., 16GB and 32GB modules) across slots, provided the total count and symmetry requirements are met?

     • Or must all DIMMs be identical in capacity?

2. Capacity Constraints (if applicable):

   • If capacity restrictions exist, are there minimum capacity thresholds or capacity combination rules (e.g., per-DIMM minimum capacity, channel-level uniformity)?

This clarification is critical for our hardware selection in multi-CPU server configurations. Your detailed guidance would be greatly appreciated.

Thank you for your support!

[Benny_Intel]

Duplicate of Thread 1671213. Closing