Hardware Model Specification
NVIDIA HGX H100 SXM5 Diagnostics
Classification: Datacenter Accelerators & High Performance Computing Equipment
Hardware operational fault codes, protection alarms, LED blink sequences, and step-by-step diagnostic fixes for the NVIDIA HGX H100 SXM5.
1 Documented Faults
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Full Multimeter & Safety Isolation Procedures
Indexed Fault Codes for HGX H100 SXM5
Step-by-step resolution manuals and root cause matrices
CODE SXid 63
Severity: Critical
Difficulty: Advanced
H100 SXid 63 NVLink Error
SXid 63 designates an uncorrectable fatal hardware error on one or more NVLink4 interconnect links, typically caused by link retrain exhaustion, physical transceiver/pad degradation, or socket cold-solder/interposer micro-fractures, halting distributed NCCL training runs.
⏱ 45-90 Mins
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