Which of the following is a valid reason to select a power supply unit (PSU) with a wattage rating that exceeds the total current power draw of all components in a desktop PC?
To guarantee higher graphics performance by increasing GPU clock speed.
To provide overhead for future hardware upgrades and transient load spikes.
Because PSUs with higher wattage ratings are always more energy-efficient than lower-wattage models.
To automatically lower the electricity drawn from the wall at all loads.
Selecting a PSU with a slightly higher wattage than the system currently requires provides additional capacity for future component upgrades and for short-duration power spikes, helping avoid an expensive PSU replacement later. It does not automatically reduce electricity costs, increase GPU clock speed, or guarantee higher efficiency-those depend on load level and PSU design.
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Why is it important to select a PSU with extra wattage for future upgrades?
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What are transient load spikes and how does a PSU handle them?