How To Check Psu Wattage Today

That confirmed it. No need to open anything.

So he gently unplugged the main motherboard 24-pin cable and the CPU 8-pin cable (noting where they went), unscrewed the four PSU mounting screws, and tilted the unit just enough to see the main label. how to check psu wattage

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

“550W,” he whispered. The new card needed 650W. If he’d just plugged it in, the PC would randomly shut down under load — or worse. He couldn’t read it without unscrewing the PSU

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 opened Windows Search, typed “System Information,” and found nothing about power supply. He tried HWMonitor — no PSU data. Then CPU-Z, then Speccy. Nothing. Software can’t read PSU stickers because there’s no data cable from the power supply to the motherboard. Lesson one learned.