How To Check What Power Supply You Have

If you bought a computer from Dell, HP, or Alienware, find your "Service Tag" or serial number on the back of the chassis. Enter this number on the manufacturer’s support website to see the original "as-shipped" configuration. Method 3: Software (For High-End "Smart" PSUs Only)

If you bought a pre-built computer and haven't changed any parts, you likely don't need to open the case. how to check what power supply you have

If you need to replace or upgrade, knowing the and form factor (usually ATX) is essential. If you bought a computer from Dell, HP,

💡 Never judge a power supply solely by its wattage. A high-quality 600W unit from a reputable brand is significantly better and safer than a generic 800W unit found in a budget pre-built. Look for an "80 Plus" certification (Bronze, Silver, Gold, or Platinum) on the label to gauge its efficiency. If you need to replace or upgrade, knowing

Search your email inbox for terms like "invoice," "receipt," or "order confirmation" from retailers like Amazon, Newegg, or Micro Center.

Knowing your power supply unit (PSU) is vital for upgrading your GPU or troubleshooting random shutdowns. Unlike your CPU or RAM, the power supply doesn't always "talk" to your operating system, making it a bit trickier to identify.

If the PC has a windowed side panel (glass), you can sometimes see the PSU label through the glass without opening the case.