After a user installs a new power supply in a desktop computer, the computer runs normally until the GPU fans speed up and the machine turns off. Which of the following is the most likely reason for this issue?
The most likely cause is an insufficient wattage rating. A graphics processing unit can draw considerably more power when it begins processing a demanding workload. The computer may operate normally during light use because its components are consuming relatively little power. When GPU utilization increases, however, the total system demand can exceed the replacement power supply’s rated output. The power supply or motherboard protection circuitry then shuts down the computer to prevent unstable voltage or component damage. A voltage-selection problem would normally prevent reliable operation from startup, while energy efficiency describes how effectively the power supply converts input power and does not determine its maximum output capacity. Power fluctuations could cause unpredictable shutdowns, but the repeatable failure specifically under increased GPU load strongly indicates inadequate PSU wattage.
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