diff --git a/infra/PROD-PROVISIONING.md b/infra/PROD-PROVISIONING.md
index 6a09c36..c19e035 100644
--- a/infra/PROD-PROVISIONING.md
+++ b/infra/PROD-PROVISIONING.md
@@ -35,6 +35,12 @@ Fill a row per node as it lands. Node 1 is as-found on 2026-08-31.
 | `/dev/kvm` | present | present | |
 | Serial | MXL1052NGN | MXL0073949 | |
 
+**Node 1's DIMMs are also not a matched pair** (surfaced 2026-09-01 by the new health check;
+unrelated to §0b and **not a fault**): `DIMM1` is a Micron **8**ATF2G64HZ-**3G2**E1 (DDR4-**3200**),
+`DIMM3` a Micron **16**ATF2G64HZ-**2G6**E1 (DDR4-**2667**). Both are 16 GB so capacity is correct,
+but they differ in rank organisation and rated speed, so the pair runs at the slower 2667. Recorded
+only because §2 requires the three nodes to end up symmetric, and "2×16 GB Micron" hid the mismatch.
+
 **The nodes are NOT hardware-symmetric.** Node 1 has a ~2011 SATA SSD with real wear; node 2 has a
 healthy modern NVMe. §2 requires an identical disk layout across all three because Longhorn replica
 placement assumes symmetry — so this is a live input to the disk decision, not a footnote. Node 2's