PXIe‑8881 Memory Configuration Requirements and Observed Boot Behavior

Issue Details

In testing three memory modules (Memory 1, Memory 2, Memory 3) on a PXIe‑8881 controller, the following behavior was observed:

• Memory 1 (suspected faulty) + Memory 2 → BIOS starts, but the system reboots during one of the checks
• Memory 2 only (Slot A) → System does not boot
• Memory 2 + Memory 3 → System operates normally

Based on this behavior:

1. Does the PXIe‑8881 require two memory modules to operate?
2. The four memory slots (B, A, C, D) are arranged from the chassis side. Are there any rules regarding slot population order or required memory‑pair combinations?

Solution

1) PXIe‑8881 can operate with a single memory module

The PXIe‑8881 supports 1 to 4 SODIMMs, and it can fully boot and operate with only one module installed. Two modules are only needed for dual‑channel performance optimization, not for basic system operation.

2) There is no required slot population order or mandatory pairing

Any slot (B, A, C, or D) can be populated first. There are no mandatory slot pairs required for the system to boot. Dual‑channel pairings exist only for performance reasons, but do not affect system startup or functionality.