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.
2,844
questions
10
votes
4
answers
397
views
Is there any computer parts that can be trashed safely (for the environment)?
I have some (non working) computer parts that I want to get rid of.
I'm pretty sure most of computer hardware can't be put in the trash safely but I want to know if some of them can.
(At the moment ...
- 780
10
votes
3
answers
7k
views
(Why) are IEC C5/C6 connectors a necessity? Why not use C13/C14?
That's a question I was asking myself the first time I saw such a weird C5 plug. That was a while ago, but I came across it again and haven't found an answer yet.
The only thing I could find out is ...
Mike
10
votes
1
answer
50k
views
Should I connect two 4-pin EATX12V power plugs?
I have an Asus P8Z68-V Pro motherboard and a Cooler Master Silent Pro 700W PSU. The PSU has two 4-pin connectors and the motherboard has one 8-pin EATX12V connector. It boots fine with only one 4-pin ...
- 1,379
10
votes
0
answers
5k
views
USB hubs that actually implements Hub Port Power Control? [closed]
No USB hub I have tried actually seems to support "Hub Port Power Control" properly that is required for USB 2.0 compliance.
The USB 2.0 standard states that :
Self-powered hubs may have power ...
- 211
9
votes
15
answers
68k
views
Using a 20V power block on a 19V notebook
Is that dangerous :
for the computer (without the battery)
for the cells
If possible, explain why.
Edit :
Here are some more assumptions :
Without the battery included, there is no risk of ...
- 334
9
votes
4
answers
29k
views
Why is the laptop charger thing (transformer) making a noise? [duplicate]
The laptop power cable consists of two cables with a transformer in the middle. The transformer is making a tiny noise while plugged in. I think it's normal... is it normal? What is it exactly?
- 40k
9
votes
4
answers
6k
views
Can I have too high a PSU power rating?
I have just ordered a 650 W PSU for my computer which previously had a 300 W, in order to install a more powerful graphics card. However, I didn't check whether anything would blow up ...
- 315
9
votes
2
answers
3k
views
Is it safe to replace a 11.25V laptop battery with 11.1V or 10.8V?
I need a replacement battery for an older laptop that originally came with an 11.25V Li-ion battery (presumably 3 cells at 3.75V each).
The batteries I found online mostly have a nominal voltage of 11....
- 161
9
votes
7
answers
150k
views
Laptop screen turns off on removing power cord
After a recent upgrade to Windows 8.1 Pro from W8, my laptop's (an ASUS X54H) screen turns off as soon as you remove the power cord.
It turns back on with no issues when you plug the power back in. ...
- 662
9
votes
1
answer
13k
views
Is it okay to use a UPS without a ground?
I have a UPS unit that I would like to use for a workstation installation that does not have a valid ground (in the Philippines, a true ground is a luxury).
I am not an Electrical Engineer, but I ...
- 193
9
votes
2
answers
4k
views
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 ...
9
votes
1
answer
1k
views
Why won't my Retina MacBook Pro let me plug the power in without the screen blacking out?
I have a late 2014 Retina MacBook Pro. I run Windows 8.1 via Boot Camp with the latest drivers.
It worked fine for quite awhile as a standalone setup. Recently I started using it only with an ...
- 321
9
votes
2
answers
5k
views
Under what conditions will a group-regulated PSU damage a modern computer?
These days, group-regulated power supply design is considered obsolete and is ideally avoided—primarily due to the poor regulation under crossload. For example, Shilka pulls no punches here, and while ...
- 3,024
9
votes
2
answers
80k
views
Is there any limit on how many SATA power connectors i can extend
I am running out of SATA power connector from my PS unit.
I have ordered One SATA to 2 SATA extender connector from ebay
I want to know that how many max i can join them in series. Can i make 4 ...
- 559
9
votes
2
answers
898
views
Where can I see what caused Windows to make the 'hardware disconnected' sound?
Whenever I switch my desk fan on or off, Windows makes a sound as if a USB device is being (dis)connected. I haven't been able to determine which device is being affected by the power spike, so I ...
