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For any HPE ProLiant Compute XD685, in rare instances, the PCIe retimers may experience overheating events. As a result, the PCIe interconnect signaling lanes may experience intermittent loss of connectivity, and one (or more) of the following may occur:One (or more) PCIe devices such as GPUs, network adapters, Data Processing Units (DPUs), NVME SSDs may disappear from the Operating System, and be unavailable to the corresponding device driver.For compute modules running Linux, the lspci command may not detect the affected PCIe devices.HPE Integrated Lights-Out (iLO) may show the affected PCIe devices with a different name, or show them missing after a power-cycle.The affected PCIe devices may not be enumerated by iLO or BIOS/Platform Configuration (RBSU).The issue may occur during power up, reboot, or normal runtime. The Integrated Management Log (IML) may log an event.
In the scenario described above, any HPE ProLiant Compute XD685.
To adjust the cooling algorithm to provide more airflow across the heatsinks of the PCIe retimers, updateAllof the following versions:System ROM version A592.48(or later)MLB CPLD version 0x06 (or later)Power Converter Board CPLD version 0x0A (or later)PCIe Switch Board CPLD version 0x0B (or later)Refer to the link shown below for complete CPLD requirements and installation instructions (the downloadable file is a zip file that includes all CPLD versions mentioned above):IMPORTANT:Flash all three CPLDs exactly in the stated order. Recommendation is to flash with the power on. There is not a requirement to power cycle between the Mother Board or Power Converter Board CPLD flash.HPE ProLiant Compute XD685 CPLDs
Operating Systems Affected:Not Applicable
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