Leo remembered a trick: search the PSU model number online. Some prebuilt PCs (Dell, HP, Lenovo) have proprietary PSUs with the wattage listed in their service manual. He searched his PC model + “power supply specs” and found a forum thread: “Comes with 500W, upgrade to 650W requires adapter.”

There it was:

He could just plug in the card and hope. But a friend’s voice echoed in his head: “Never guess with power. Guess = fireworks.”

The power supply sat in a bottom corner, fan facing down or back. The problem? The wattage sticker was on the other side — facing the inside of the case or hidden behind cables.

He decided to look for a label he could see. Some PSUs have a second sticker on the back (where the power cord plugs in). He checked there — nothing but voltage input specs.

He couldn’t read it without unscrewing the PSU and turning it around. But before doing that…