If the sticker is hidden, facing the bottom of the case (as is common in bottom-mounted PSUs), or covered in dust, you may only be able to see the side of the unit.
It is the unglamorous workhorse of the computer world. It sits in the dark corner of your case, a heavy brick of anonymity, humming quietly while the graphics card and processor soak up the glory. But the Power Supply Unit (PSU) is the heart of your system—and if you don’t know its limits, you are driving a car with no fuel gauge. how to tell power supply wattage
Usually located on a sticker on the back or bottom of the PC. If the sticker is hidden, facing the bottom
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. But the Power Supply Unit (PSU) is the