And you realize: the question was never “how to tell power supply wattage.” The question was “how to stop lying to yourself about what you need.”
So you learn to read the label like a crime scene. The +12V rail—that’s the one that matters. CPUs and GPUs drink from it like marathon runners at a water station. If the label says “+12V @ 30A,” that’s 360W. Not 450W. The rest of the wattage is split across +5V and +3.3V, which your hard drives and USB ports sip politely. A 450W PSU with weak +12V is a 360W PSU pretending to be brave. how to tell power supply wattage
The sticker gives you a number. The truth gives you a lesson. And sometimes, the only way to learn is to sit in the dark, with a dead machine, and finally turn the box over. And you realize: the question was never “how
You order a new PSU that night. 650W, gold-rated, with a label you can read without dislocating your wrist. When it arrives, you install it slowly, carefully, and for the first time you notice how the cables feel different—thicker, firmer, less like cheap speaker wire and more like tools. You press the power button. The fans spin. The motherboard chimes. The machine breathes like it just woke from a long fever. If the label says “+12V @ 30A,” that’s 360W