PowerEdge: IR7000: M7725 ConnectX-8 Disconnection with PCI3040 Error During High System Load
Summary: In rare cases, such as the CPU, memory, NVIDIA ConnectX-8 InfiniBand card, and other PCIe cards are under a heavy workload, the ConnectX-8 connection drops for about five seconds. When this happens, a PCI3039 or PCI3040 error is logged in the System event log (SEL). ...
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Symptoms
In rare corner cases, when the M7725 is configured with a NVIDIA ConnectX-8 (P/N: NYKN5), the LC/SEL logs report a PCI3039 or PCI3040: A high-severity issue is detected error on the CX-8 InfiniBand card.
Concurrently, the OS logs recorded a CmpltTO (Completion TimeOut) PCIe fatal error on the ConnectX-8 card, which then recovers successfully after about five seconds.
Cause
Unknown
Resolution
Follow the NVIDIA Performance Tuning Guide 
Affected Products
Mellanox Family of Adapters, PowerEdge M7725Article Properties
Article Number: 000357077
Article Type: Solution
Last Modified: 21 Nov 2025
Version: 2
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