Hardware Model Specification
NVIDIA HGX H200 SXM5 Diagnostics
Classification: Enterprise Server & Cloud Infrastructure Equipment
Hardware operational fault codes, protection alarms, LED blink sequences, and step-by-step diagnostic fixes for the NVIDIA HGX H200 SXM5.
1 Documented Faults
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Full Multimeter & Safety Isolation Procedures
Indexed Fault Codes for HGX H200 SXM5
Step-by-step resolution manuals and root cause matrices
CODE XID 79
Severity: Critical
Difficulty: Advanced
H200 GPU Fallen Off Bus
NVIDIA driver logged XID 79 indicating the GPU has fallen off the PCIe/NVLink bus. This is triggered when an uncorrectable double-bit ECC memory error (DBE) or link-layer parity collapse isolates the HBM3e subsystem, causing the ASIC microcontroller to halt execution and sever host MMIO communication.
⏱ 45-90 Mins
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