Is it Safe to Install a Higher Wattage Power Supply in My Computer?

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I want to upgrade my current case that has a 300W PSU to a nicer looking case, but it has a 520W PSU. Is it ok and how does the “W” difference influence PC operation?

It’s quite all right, and if things were working well before, you probably won’t notice a difference.

Let’s look at why, and just what that “W” means. I get questions on this topic frequently.

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If Shutting Down Windows Cleanly Is So Important, What Happens When the Power Just Goes Out?

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I am aware that not going through the proper Windows shutdown can possibly have negative effects on a computer. But my question is if a computer loses power (due to a household power outage, not anything wrong with the power supply), are these negative effects strictly software related (meaning a format and reinstall would fix them), or might it cause hardware problems as well?

Shutting down Windows properly before turning off the power to your computer is important.

Not doing so can result in data loss and corruption as files are left only partially written to disk. But just turning off the switch is unlikely to actually harm your hardware.

Surprisingly, a household or other area-wide power outage turns out to be a completely different, riskier issue.

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How Should I Store My Backup Laptop?

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I recently replaced my laptop with a desktop, moving the laptop to a backup-machine status. That means I won’t use it daily, or evenly weekly. How should I store the laptop? Battery in? Battery out? How long can I store it without charging it? Any other issues I should consider?

I’m going to assume you’ve already seen Should I remove the battery if I leave my laptop plugged in?

What’s interesting here is that yours is a different — almost opposite — situation: infrequent use.

That actually makes this more difficult. Let’s review the options.

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Can I Use a Power Supply with a Higher Wattage Rating on my Laptop?

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So I did this search on your answers to power supplies but I’m still not clear about the difference between amps, volts and watts. I’ve got a 130 watt power supply, left over from my last Dell laptop, that I would like to use on my new Ultra book which came with a 65 watt power supply. Both units are 19.5 volts, but the 130-watt is 6.7 amps and the 65-watt has a rating of 4.6 amps. What I’m trying to accomplish is keeping the 65-watt unit wrapped up in my laptop bag and the 130-watt wired into my desk for convenience.

The short answer is that you may be able to use that 130-watt power supply with your new machine, which came with a 65-watt supply, if a couple of conditions are met.

Let’s review those conditions.

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