What is PSU-INSUFFICIENT?
PSU-INSUFFICIENT shows up as a high-severity power supply unit (PSU) fault. The resource does not have time to cover the consumption of all components. Causes resets. This usually traces back to GPU upgrade without PSU replacement and PSU degradation. The steps below are ordered to resolve this efficiently.
Common Causes
- GPU upgrade without PSU replacement
- PSU degradation
- Too many components
Step-by-Step Fix Guide
-
1
Calculate the consumption on the calculator
Begin with Calculate the consumption on the calculator; it's the step that resolves PSU-INSUFFICIENT for the largest share of reported cases.
-
2
Buy a stronger PSU (+20% reserve)
A recurrence usually points to a rarer psu instability cause, which is what the following steps are meant to catch.
Commands & Diagnostics
No specific commands required for this error. Follow the step-by-step guide above.
Frequently Asked Questions
The leading cause of PSU-INSUFFICIENT is GPU upgrade without PSU replacement, though PSU degradation and too many components also show up in our reports.
Most PSU-INSUFFICIENT reports resolve after "Calculate the consumption on the calculator". The rest of the guide above is there for the cases that don't.
PSU-INSUFFICIENT is a high-severity error. It won't damage your PC instantly, but repeated occurrences usually point to a deeper problem worth addressing soon.
You shouldn't need to. Work through the guide above first — a reinstall is only worth considering if none of those steps help.
Still Need Help?
Search our full database of 535+ documented PC errors for more solutions and step-by-step repair guides.
Search Error Database