Questions tagged [power-supply]
A power supply is an electronic device that supplies electric power to another device, such as a computer, monitor or printer. This is achieved by converting wall power (or mains power) to a lower voltage, and in most cases also from AC to DC. Most power supplies also provide protection from overload, power surges and other potentially problematic or hazardous conditions.
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Laptop power supplies, does current matter?
I have two laptops (same manufacture), with the same type of power connector.
However, the power supplies/transformers are slightly different.
The output on the first laptop's power supply is 15.6&...
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Should laptops remain plugged in when their battery is 100% charged?
When your laptop's battery is 100% charged, should you leave it plugged in so any battery power doesn't get used, or will that cause overcharging, overheating, etc.? Should the laptop be unplugged ...
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Graphics card and PSU requirement
Note: This is intended to become a canonical post.
I got a dedicated graphics card of type XXX and it claims I need at least a YYY Watt PSU.
How big does my PSU really need to be?
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How can I tell if an AC adapter is compatible with my laptop? [duplicate]
Possible Duplicate:
charging laptop with a diffrent manufacture charger
How can I tell if an AC adapter is compatible with my laptop? For example, does the voltage output have to bee the same, ...
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Why do some AC adapters and power supplies generate a whining noise, and what can I do about it?
I have many different AC adapters and power supplies for a variety of devices, ranging from small 5V/1A USB chargers to laptop power adapters and desktop PSUs. However, I often hear a whining noise ...
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Can a 20V 4.51A power supply be used with a computer that requires a 19V 3.42A power supply? [duplicate]
I have a laptop that says it needs a 19V 3.42A power supply. I have a Dell 20V 4.51A power supply.
Can I use this power supply with my laptop, or will it destroy the machine?
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Power Supply Capacity Formula
Given that I am building a home computer from scratch and I have several components (MB, CPU, HDD, Video, Sound, etc) which have specific power requirements, is there a formula for me to calculate the ...
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How to test a power supply?
My computer powered off the other day on its own, and now when I push the power button, nothing happens. My assumption would naturally be that the power supply is done (possibly well done) but is ...
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How to choose a UPS / calculate power for a new PC
Seven years ago a friend gave me a Liebert PowerSure 250 UPS and it has done well for whatever (home) PC and monitor I've plugged into it over the years. I've just ordered a new PC with the Intel core ...
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Is it safe to use a power supply with a different laptop? [duplicate]
Possible Duplicate:
charging laptop with a diffrent manufacture charger
I have a Dell Vostro 1500 laptop, but unfortunately I lost the power supply in Indianapolis last month. I have a power ...
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Will a 500W SMPS consume more electricity than a 250W SMPS if they are powering computers with same specifications?
Will a 500W SMPS consume more electricity than a 250W SMPS if they are powering computer with same specifications ?
Or is the SMPS designed in such a way that it only draws the required power form ...
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How to troubleshoot a computer not booting up when powered on?
I can turn on my computer and sometimes it will boot up just fine. After a while of use, days or even a week, when I try to turn it on, it powers up, in that the fans spins up, the power indicator ...
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Battery not charging, laptop only works when plugged
Yesterday my battery was working fine (for an old computer). It could sustain a normal usage for three hours at least. Today I have the following symptomas:
I noticed that it didn't charge, even ...
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What is the power output of a USB port?
As the title says, what's the power output of a USB port?
Is it a standard value, or it may change depending on manufacturer/model, and so on?
If that value is not standard, how can one determine ...
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How can I check if my system needs more PSU power?
i've just bought a new Radeon HD5850. Seems to be working fine, etc. BUT, when I turn the computer on, it sounds like .. hmm .. maybe the HD's try to spin up 3 times during POST. And POST always has ...
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