Ever wondered what’s powering your entire PC setup? Whether you’re planning to upgrade your graphics card, fix random shutdowns, or you’re just curious about your computer’s parts, knowing your power supply unit (PSU) is super important. But here’s the best part — you don’t need any tools!
In this guide, we’re going to show you some easy ways to check what power supply you have in your PC — no screwdriver, no opening the case, no stress.
Let’s get started!
Why Knowing Your Power Supply Matters
Before we talk about how to check your PSU, let’s look at why it even matters.
- 🪫 It powers everything: Your PSU sends electricity to all the parts in your computer.
- ⚡ It needs to match the parts: If you’re getting a new graphics card or CPU, your PSU needs to be strong enough to handle it.
- 🚧 Helps with fixing problems: If your computer keeps restarting or turns off randomly, a weak PSU might be the reason.
- 🛠️ For future upgrades: Knowing that your PSU is strong and good quality helps you plan for future changes.
So yeah, your PSU might not be flashy like a RGB keyboard, but it’s super important.
How to Check What Power Supply I Have (Without Opening Your PC)
Not everyone is a hardware expert or wants to remove screws. That’s totally fine! Here are some smart ways to find out your PSU info without touching the inside of your PC at all.
1. Check Manufacturer or Prebuilt PC Info
If you bought a prebuilt PC like from Dell, HP, Lenovo, or even gaming brands like Alienware, your PSU info might already be online.
Here’s what to do:
- 🔍 Go to your PC manufacturer’s website.
- Type in your PC model number in Search.
- Look for the “Specifications” or “Product Manual.”
- Look under a section like “Power” or “Power Supply.”
📝 PRO TIP: Just Google your model number + “specs” or “power supply” — you’ll usually find it fast.
This will tell you important things like:
- PSU wattage (Ex: 500W, 650W)
- Brand or model (Ex: Corsair, Coolermaster)
- Efficiency rating (Ex: 80+ Bronze/Gold)
2. Use Software to Get Clues
Bad news: There is no program that can directly tell you the exact brand or model of your PSU.
But good news: Some programs give you helpful info about your system’s power use.
Try these tools:
- HWInfo
- Speccy
These tools can show you:
- Real-time voltage data
- How much power your PC is using
💡 You can use this info to see if your power supply is struggling or working fine. It’s not about ID’ing your PSU, but it helps if you’re seeing weird computer issues.
3. Look Through the Case Window
Have a computer with a clear side panel (glass or plastic)? You might be able to SEE your PSU’s label right through it!
Try this:
- Get a flashlight or use your phone light.
- Shine it into the case, especially near the bottom-back part where the PSU usually sits.
- Look for labels or stickers on the PSU itself.
You may see things like:
- Brand (Ex: EVGA, Corsair)
- Wattage (Ex: 750W)
- Model number
📸 PRO TIP: Take a picture with your phone camera and zoom in later. This can help you read hard-to-see text.
4. Check Your Receipt or Email Order
Bought your PC or PSU online? Your email or receipt might have the info!
What to do:
- 📧 Search your email inbox for words like “power supply,” “Corsair,” “EVGA,” or “750W.”
- 🛒 Check your purchase history on Amazon, Newegg, Best Buy, etc.
- 🧾 Custom build? Find the order or part list from the company.
You may find something like:
“Corsair RM750x 750W 80+ Gold PSU (Modular)”
Boom — there’s your answer, and you didn’t have to even look at your PC.
5. Ask the Person or Company That Built the PC
Bought your PC used from someone else or a custom PC business?
Just message them politely and ask:
- What power supply is inside?
- What’s the wattage?
- What’s the brand name?
- Is it modular (cables can be removed) or not?
- Does it have an 80+ rating?
Even if they don’t know everything, some info is better than none.
How to See What Power Supply I Have: Remember These Tips
Now that you know your options, keep this stuff in mind:
- Wattage is not everything — build quality matters too.
- Modular vs. non-modular matters for cable mess inside your PC.
- 80+ rating shows how energy-efficient your PSU is.
- Look for the model number — you can always Google it later.
If you ever do open your PC safely, you’ll likely see a big label on the PSU that tells you all the details you need.
Bonus: How to Know If Your PSU is Good (Without Opening It)
Even once you know the model of your PSU, you still might wonder: Is it good?
Here are easy ways to check:
- Google the PSU model — read reviews from sites like Tom’s Hardware, TechPowerUp, etc.
- Check if it has an 80 PLUS rating (Bronze, Silver, Gold, or Platinum)
- Look at PSU tier lists (Google “PSU Tier List” or visit Reddit’s r/buildapc)
💡 These lists group PSUs by how high their quality is — super helpful when planning upgrades or replacing an old one.
Summary: Easy Ways to Identify Your Power Supply (No Tools Needed)
Let’s quickly review how to check what power supply you have:
✅ Look up your PC model online and check the specs
✅ Use software tools to analyze power usage (like HWInfo)
✅ If you can, look through your case panel for PSU labels
✅ Check purchase emails, invoices, or order history
✅ Contact the seller or builder for PSU details
No need to open up your computer — just a little research and creativity go a long way!
Final Thoughts: Power Is Knowledge
Now that you know how to find out what power supply you have, you’re one step closer to understanding your computer better — and making smart upgrade decisions.
You don’t need to be a PC expert. If you can do a little detective work using the tips above, you’ll be able to say: “Yep, I know exactly what PSU I have.”
💬 Have you found your PSU specs yet? Share your story or tips in the comments — you might help someone else!
✅ Planning a GPU upgrade soon? Bookmark this guide to come back to it later.
Stay curious, and happy computing! ⚡💻
🔁 If this article helped you, share it with a friend who’s building or upgrading their PC. It could save them time (and stress) too!