All Questions
Tagged with power-supply voltage
58
questions
2
votes
2
answers
18k
views
Can low voltage damage laptop or it's battery?
Sometimes I get very low voltage in my house. I am worried if I connect my laptop charger to the socket, will it damage the charger, battery or the laptop itself?
- 139
-2
votes
1
answer
96
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Power Adaptor Compatibility [duplicate]
my Sony Vaio Power Adaptor broke today and i wondering if i could replace the broken one with the Adaptor from my older Vaio, here are the specs :
Broken Adaptor : VGP-AC19V54
Old Adaptor : VGP-...
0
votes
0
answers
87
views
Computer slow after plugged into wrong voltage
So I set up a desktop computer running ubuntu in a classroom that was running through an AVR at 220 volts. I got a report that it wasn't working, so I came to look at it, and sure enough, fans and ...
- 1,697
0
votes
1
answer
2k
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connecting two 3.7v battery's to tablet, in parallel for extend the working capa
my tablet have 2500mah battery. it works for four hour. but I want to extend the source power.
so I want to connect another same voltage battery to tablet. battery was 1500mah.
can i make connection ...
Vighnesh
1
vote
0
answers
204
views
Should you worry about high voltage and wattage on a non-overclocked computer?
I've been wondering if I should be worried at all about high wattage or voltage on a non-overclocked computer. I say non-overclocked because when I Google search this question or something similar it ...
- 39
-1
votes
3
answers
4k
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What do OUTPUT charts of PC Power Supplies mean?
I'm looking at various power supplies and they all come with different output cables.
They also have different OUTPUT charts, for example:
What I'm wondering:
What are these output columns are ...
- 325
0
votes
1
answer
747
views
How can a power supply rated 7A be strong enough for two devices rated 5A? [closed]
I am not understanding something fundamental to amperage:
Consider this adapter which outputs 12V 7A. It claims that several (eight, in this case) devices running at 12V 5A can draw enough power from ...
- 1,154
2
votes
2
answers
4k
views
PSU blue wire reads strange voltage
I was testing my PSU with the paperclip method and checking the voltage of every wire just to be sure it is 100% functioning.
What surprised me was that every wire was working just fine but one, the ...
- 35
2
votes
1
answer
3k
views
Is PSU voltage ripple something to worry about?
I'm currently putting together my first computer and I've had my eye on a Fractal Design Newton R3. From all of the reviews I've read this PSU comes out shining with the exception of voltage ripple on ...
- 222
1
vote
2
answers
2k
views
Computer cables explained [closed]
I've noticed lately that places to learn about both power supply cables and also peripherals and fans aren't that easy to find.
There's very little information available that gives detailed ...
- 222
1
vote
3
answers
2k
views
would I save power using a lower voltage power adapter? (on a modem)
from various experiences modems, access points, and other devices will often run fine even with power adapters of lower voltages (compared to their original power adapter).
I am wondering if using a ...
user253974
0
votes
1
answer
2k
views
Power Supply case measures 75V?
My friend showed me his dead computer. When I powered up, the green LED on the motherboard didn't even come on. He had bought a new $40 500W power supply and he wanted me to install it. I did, and ...
- 11
0
votes
2
answers
885
views
Cable from laptop brick to wall [duplicate]
I've seen plenty of questions asked about the power output of laptop bricks to the laptop - however my question is does the plug and cable that runs from the laptop brick to the wall need to match up?
...
- 1
1
vote
2
answers
8k
views
Power supply bad with good voltage?
I am trying to drive out the reason I am having some hard drive "hard resetting link" error problems on a Linux Debian box.
I am trying to eliminate the power supply as a problem in trouble shooting, ...
- 1,934
2
votes
1
answer
12k
views
Insufficient power from an adapter
Would not having enough power (or voltage or amperage) from an adapter make a laptop no longer charge/boot up (if the battery is out of power)? What about causing shorts? And would using a different ...
- 133
0
votes
1
answer
75
views
Manually starting a PSU lowers the output Voltage
I have a PSU. When I start it using a motherboard, I get a little over 5 and 12 volts on the respective lines. But when I manually start it (by connecting PS_ON to ground), I get only 4.2 Volts on the ...
- 116
2
votes
2
answers
2k
views
Weird voltage issues - intermittent low 5V line
My computer has developed a strange ailment: when I turn it on, the 5V power line from the PSU is very low, hovering at around 4.2V. This is intermittent however, sometimes it jumps back up to 4.98V.
...
- 145
1
vote
1
answer
3k
views
What are the costs and benefits of using 12V-only motherboards? [closed]
According to my research, it sounds as though power efficiency concerns in recent years have driven some hardware manufacturers to create different power supplies and motherboards which are "12V-only"....
- 423
1
vote
2
answers
883
views
HDD is very slow after voltage drop
The HDD is Seagate Barracuda 7200.7 160 Gbytes
Model ST3160023A. Of course it is not SATA.
I once connected it to the USB via special adapter IDE-to-USB, and a separate power unit. The voltage drop ...
- 143
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
1
vote
1
answer
3k
views
Have a 40W power supply - will it power a laptop that needs 65W? (18.5v 3.5A (=65W))
Have a 40W power supply - will it power a laptop that needs 65W?
I know that the basic calculation, voltage x amps = required wattage, so 18.5v x 3.5A =65W
I realise that it should only draw the ...
- 13
3
votes
1
answer
2k
views
PSU voltage with multimeter
My PSU started making some noises even when the fans were stopped. I also had USB problems (two USB devices burned) so I checked the PSU voltages with a multimeter.
I removed the PSU and connected it ...
- 1,627
2
votes
2
answers
3k
views
My dlink power supply broke, I found a similar one on old boxes. Is it going to damage my router if used (specs and pic inside)?
I have an old dlink wi-fi router to connect old 802.11g devices at home. It's power supply just fried after a storm.
Buying a new power supply is almost the same price as a used router like mine, and ...
4
votes
3
answers
10k
views
Can I run a router with a lower voltage power adapter?
The power adapter for my Linksys WRT54GL v1.1 router died - its output was 10V, 1000mA.
I've tried using a replacement adapter (7.5V, 1000mA) and so far it works. Is this situation stable, or should ...
- 3,031
2
votes
2
answers
4k
views
Same voltage, different amperage for two power supplies
I've just plugged an 18.5V 6.4A HP power supply into an HP laptop; I normally use an 18.5V 3.5A power supply. Since the connector fit, I figured I'd give it a go... so far no funny smells or fires.
...
- 81
0
votes
1
answer
3k
views
Very low power supply voltages
My computer is fairly modest in terms of power consumption:
4 7200 RPM SATA-II hard drives
An IDE DVD-writer
Four 80mm case fans
Two 95mm heatsink fans
Intel Core i7-920 2.66 GHz (OC to 3.80GHz)
...
- 6,757
3
votes
2
answers
28k
views
PC power supply & normal range for voltages reported in BIOS hardware monitor?
I'm trying to diagnose whether my computer has an ample power supply. Sometimes when I play a video-intensive game, both monitors lose the video signal, even though the computer remains on and sound ...
- 10.9k
6
votes
1
answer
5k
views
What are good values for PSU voltages?
I have an odd computer I'm trying to fix that will crash only during the setup of an OS(crashes on every OS I've tried so far) It's not overheating and it is stripped down as much as possible and I've ...
- 4,474