Hardware Model Specification
NVIDIA HGX H100 8-GPU Baseboard Diagnostics
Classification: AI Datacenter & HPC Compute Equipment
Hardware operational fault codes, protection alarms, LED blink sequences, and step-by-step diagnostic fixes for the NVIDIA HGX H100 8-GPU Baseboard.
1 Documented Faults
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Full Multimeter & Safety Isolation Procedures
Indexed Fault Codes for HGX H100 8-GPU Baseboard
Step-by-step resolution manuals and root cause matrices
CODE SXid 63 / NCCL 12
Severity: Critical
Difficulty: Advanced
HGX H100 NVSwitch Link Failure
SXid 63 indicates an uncorrectable NVSwitch NVLink SerDes receiver error, causing dropped inter-GPU packets and leading to NCCL distributed training collective timeouts (Error 12).
⏱ 45-90 Mins
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