System requirements are averages. However, modern GPUs experience where they briefly demand double their rated power. A 600W system might momentarily spike to 750W. If your PSU wattage output is exactly matched to your average draw, these spikes will trigger the Over Current Protection (OCP) and shut your computer down instantly.

Necessary for high-end gaming. If you’re running an RTX 4080 or a power-hungry i9 processor, this provides the necessary headroom for "transient spikes" (sudden, millisecond-long jumps in power draw).

Might split their power across multiple rails (3.3V, 5V, and 12V). You might see a "500W" PSU that only offers 350W on the 12V rail.

Ideal for office PCs, home theater PCs (HTPCs), or systems using integrated graphics.