All Questions
Tagged with power-supply power
468
questions
0
votes
1
answer
173
views
Is it safe to pull the power plug off of the monitors?
I have four monitors plugged in through Amazon Smart plug so that I can turn off all the monitors with ease while keeping the Desktop running.
But one of the monitors recently failed. Is it safe to ...
- 9,494
0
votes
0
answers
368
views
How to know if USB hub receives enough power to power all my applicants/devices(used bandwidth)?
I have USB type c that connects these devices: (1) 2 TB SSD (2) Ethernet network (3) Mouse (4)Keyboard (5)Aux speakers.
I was wondering if the hub receives enough power or not from a single type c ...
- 441
1
vote
3
answers
903
views
Boot issues after thunder storm
The village where I live was sat under a thunder cloud for most of Friday, and we suffered a few power fluctuations (specifically, what seemed to be split-second outages). When I got back home from ...
- 21
14
votes
1
answer
4k
views
Is it okay that part of the power jack is outside the device?
I have some devices whose DC adapter connector/jack is only partially plugged in.
For example, my monitor has an AC to 180 W DC power supply. When connecting the transformer to the monitor, the DC ...
- 159k
1
vote
1
answer
3k
views
windows laptop event log power source change from battery to ac power
For the windows laptop event log power source change, how can I tell if it is switching from AC power to battery or from battery to AC power?
I attach a screenshot here.
It seems impossible to tell ...
- 64
1
vote
8
answers
119k
views
"0190: Critical low-battery error" on Lenovo Thinkpad T540p
When powering on, a refurbished Lenovo Thinkpad T540p (which worked for a few months without any problems) shows "0190: Critical low-battery error".
Although the Thinkpad splash screen says to press ...
- 1
0
votes
1
answer
2k
views
Computer monitor shuts off temporarily when the window AC kicks on
When my window AC kicks on, one of my two monitors kicks off for a couple seconds. It's never the same monitor when it happens. I installed a very large UPS thinking it was power drops, but it doesn't ...
149
votes
6
answers
1.1m
views
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 ...
- 279
1
vote
1
answer
9k
views
Asus T100 won't boot - LED blinks 5 times
I've been using my ASUS T100 for more than 5 years. Today, I started it as usual, but only noticed the LED blinking 5 times. When charged fully, it blinks 5 times in white and when unplugged, it ...
- 1
0
votes
1
answer
1k
views
Why is my UPS causing my monitor to make a high pitched humming noise
I recently purchased a UPS for a new server build for my home. Since the server sits next to my desk, I figured I'd plug my Macbook and monitor into the UPS as well. That way if the power goes out, I ...
- 1
0
votes
1
answer
67
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I am sure there is electricity from the power supply, but the device won't power up
For someone without an electrical engineering background, I've searched this issue online but couldn't find satisfying answers, so I'm asking it here.
I have had this issue multiple times in the past.
...
- 43.2k
0
votes
1
answer
226
views
If my PC doesn't "turn on" randomly, what is that a sign of?
2.7 years ago, I bought a HP Z240 tower workstation PC.
Recently, I have begun noticing that, when I press the power button in the morning, it doesn't "fully power on", or something similar. ...
- 1
1
vote
3
answers
5k
views
Can a Desktop Computer run off of a dc battery directly?
so I have my room setup to run off a dc battery, and the battery itself is charged via a solar panel. I currently use an inverter to power my pc setup but I would love to know if I can eliminate the ...
- 1
0
votes
1
answer
32
views
What would cause a fully powered off workstation to turn itself back on?
I have an old workstation that I want to keep fully powered off when I'm not around. Just recently I came home to find it powered on, even though I didn't touch it. There is no one else around (and ...
- 1,303
0
votes
0
answers
204
views
Linux embedded system: detect power on USB (as USB device)
I'm working on a Linux embedded system that can draw its power from two distinct sources:
a dedicated power supply
power supply through USB (connected to an external USB host)
I must know when the ...
0
votes
0
answers
188
views
Laptop touchpad problems when PSU charger (Original) is plugged in
I have an HP laptop which battery is damaged since February of 2021. HP DIAGNOSTIC TOOLS tells me that
battery internal capacity is only at 10% of its factory capacity. The battery is also inflated. I ...
0
votes
1
answer
2k
views
How to disable the power button on Windows 10?
I have the following settings set in my Power Options settings:
However, it still does not stop my computer from being turned off when the power button is pressed. My cat often jumps onto my computer ...
- 43.2k
0
votes
2
answers
702
views
Laptop shows no sign of life: motherboard or power supply issue?
My Toshiba Qosmio x505-q890 laptop has suddenly stopped powering on. Symptoms are the laptop simply does not respond to the power button when pressed, but when the DC adapter is connected the adapter ...
3
votes
0
answers
592
views
Different results for power measurement on ubuntu using powertop and energy_uj
I want to measure power usage of the whole PC in software on Linux. I've tried these two methods from here and here:
using powertop:
rm -f powertop.csv
sudo powertop -q -t 60 -C powertop.csv
cat ...
- 131
1
vote
1
answer
7k
views
Using a 6 amp connector instead of the 16 amps provided in Power Supply box ( Corsair RM850)
I purchased a corsair RM850 which comes in the box with a 16 amp power cable to plug into the home socket.
Problem is that I do not have a 16Amp socket in any of my walls.
There are 2 questions which ...
- 9,103
0
votes
1
answer
632
views
Can you run a laptop with a dead battery using only a power bank of appropriate size?
I have a MacBook Air (13", early 2014) with a dead battery (won't accept charge). I currently run it using the MagSafe power adapter. However, the magnetic connector is too easily disconnected ...
- 56.1k
12
votes
3
answers
31k
views
How can I detect the USB-C power delivery voltage?
I have an HP laptop which I charge with a USB-C charger through the USB-C port. I have no idea which power delivery (PD) version it has and if it's PD-compliant at all. However, as the charging works, ...
- 2,333
0
votes
2
answers
88
views
Replace Desktop Power supply with Adapter based Power supply
I have a nice basic desktop with Pentium G4560 with a Crucial DDR4 RAM & Samsung EVO SSD. It worked nice and avg power consumption of ~45 Watt. The Power supply comes with a cabinet which costed ...
- 14.2k
0
votes
1
answer
4k
views
Power usage in Task Manager says "very high"
I am running the next parts:
SMPS 750W
Ryzen 9 3900x
RTX 3060
24 inches led monitor
These parts are connected to 600 VA ups and wherever I run a software I see my power usage shoot up very high and ...
- 1
0
votes
1
answer
417
views
How to know if the computer is getting enough power?
I have a UPS (650VA) and connected few devices including a laptop to it. I need to know is there a software or any tool or any way that I can know the devices are getting enough power? And also is ...
CommunityBot
- 1
1
vote
1
answer
1k
views
Why did my UPS works as expected if unplugged from wall, but seemingly failed when an actual power disruption occurred?
I've got several UPS units protecting my various devices. Today the room lights flickered for a minute, I heard a UPS "clicking" sound, and got notifications from my Mac that a few of my ...
CommunityBot
- 1
0
votes
0
answers
62
views
ASUS Laptop Screen Hertz Issue
I currently have an issue with my ASUS laptop.
When the power is unplugged the screen refresh rate drops down to 48 hertz from 120 hertz
This caused the screen to glich and cut in half so that the ...
- 101
0
votes
2
answers
2k
views
PATA connectors looks like MOLEX in my power-supply-unit
I have installed this Corsair CV550 PSU in my computer. In the specification it says it has 2 PATA connector in single cable. Check the following image:
As I don't have or need any PATA powered ...
- 139
1
vote
1
answer
391
views
Computer Restarts while on UPS
I am using a 650va ups (not a good brand) My previous pc had 400w psu and it worked fine.
Now i am using a new pc (i5 10400f, gtx 1660ti oc, 550w 80bronze psu)
Whenever the electricity goes off, trip ...
- 1
0
votes
1
answer
714
views
Can't start desktop PC unless motherboard is plugged in to PSU with PSU on
A weird issue appeared on my desktop computer. After a few reboots via reset button in a row (was fiddling with bootable USB stick etc), PC refused to boot. Thought it was the PSU, but no. Then after ...
- 1
1
vote
2
answers
3k
views
UPS getting overload when PC is connected
I have a UPS with 600VA.
When I connect it to my small laptop and a monitor, the total wattage amounting to 40W approximately (to the higher side), the ups on backup runs for 40-50 minutes.
**But when ...
- 219
0
votes
1
answer
2k
views
Do laptop chargers still consume electricity when the laptop is turned off (shut down) and the charger is plugged in [duplicate]
I tend to forget that I am charging my laptop when I turn it off and leave it overnight charging, even though it is turned off. I'm wondering, does it still consume electricity?
- 56.1k
1
vote
0
answers
545
views
Why are most laptops double-insulated while desktop PC's aren't?
As the title suggests, I'm curious why double insulation isn't considered an important factor when building a PC. I know most PSU's feature a third-prong for ground connection to avoid electrical ...
CommunityBot
- 1
0
votes
1
answer
1k
views
Computer doesn't turn on when pressing the power button
It's not that it doesn't boot, but that the computer simply doesn't turn on. Absolutely nothing happens when I press the power button. Strangely enough, at some point it does turn on. This time it ...
- 101
0
votes
0
answers
188
views
Computer draws more watts when electricity in house isn't stable?
I have an i7 5960x (8-core, 16 threads) and two GTX 970s that are all running at full load 24/7. The total system power usage is typically around 450-550 watts when everything is under load. It has a ...
- 1,630
4
votes
4
answers
28k
views
What is the maximum power supplied by a USB 3.0 port?
USB 3.0 specifies 900mA (0.9A) per port.
What happens when you plug a non-powered (no AC adapter) hub into an USB 3.0 port? Do all of the items plugged into the port need to use 900mA maximum total ...
- 1,505
65
votes
11
answers
92k
views
What happens when hardware tries to draw more power than power supply can provide?
As far as I understand, computers don't always draw the same amount of power from the power supply all the time. There are times when hard drives are on standby and not using as much as when they're ...
- 8,510
0
votes
0
answers
588
views
Is It possible to use a 5V/3A power supply to only power a PD USB Type C Hub and not the laptop?
Situation: I require a powered USB hub because I need to expand a Thunderbolt/USB 3.0 Type C port to a few USB 3.0 Type A ports for a few portable hard drives.
Problem: It is almost impossible to find ...
- 135
0
votes
0
answers
156
views
Task Manager is showing that ,specifically video games, are using too much power
GPU: ASrock Challenger RX 5600 XT,
PSU: Thermaltake Smart series 600 W.
I recently bought a pre-built budget gaming PC. For some reason, and only when playing High-CPU taking games (CSGO and Siege), ...
1
vote
1
answer
325
views
GPU crash, possible power issue?
I am having trouble with my new GPU, and I think it's a power issue.
The setup: PSU Mars Gaming MPII 550, CPU i5-10400
The problem: I installed yesterday, for the first time, my GPU GTX 970. The PSU ...
- 113
1
vote
0
answers
30
views
Graphics card power consumption regarding PCI power and 6-Pin power [duplicate]
I am aware that the PCI-E slot can power up to 75W and so can the 6 pin molex power cable, I was wondering if the power draw is split evenly between both the PCI and 6 pin cable, for example would a ...
- 11
0
votes
3
answers
2k
views
Can a power outage damage PC hardware?
TL;DR: can a planned "power outage" damage PC hardware aside from HDD/SSD (which won't be connected to the PCs) - mobo, gpu, cpu, psu, dvd, fans?
(the internet says "yes it can" vs ...
- 32k
0
votes
0
answers
873
views
PSU plugs don't line up with CPU power on motherboard
My 650-watt power supply came with many connectors. There is a problem, however: on the left side of both 8-pin connectors, the arrangement is wrong (the roundish-bottomed and square pins are swapped ...
- 1
0
votes
1
answer
263
views
how lowering tdp decreases amount of heat produced?
If there are two identical processors (ex 11 th gen 1165g7) with a single difference in its TDP value (eg. [email protected] & tdp@18watt and [email protected] & tdp@28watt) where turbo boost is 4.7ghz ...
- 121
0
votes
2
answers
9k
views
Computer will not turn on after replacing CPU, PSU, and motherboard
I recently replaced the PSU, motherboard, and CPU after my computer shut off randomly. Now when I try to turn it on, I get no response.
I've tried:
Taking out the RAM
A CMOS reset
Swapping out the ...
2
votes
1
answer
251
views
Why is SSD peak power drain higher for read than write?
The graphs on this page show that the Crucial MX500 SSD has a peak measured power draws of:
Read - 2.4W
Write - 2.0W
Why would sustained random reads draw more power than sustained random writes?
- 93.8k
1
vote
1
answer
1k
views
Whenever I plugin my laptop's charger, screen turns brighter and I don't want it, what's the solution?
Whenever I plugin the charger screen gets more brighter, I want it to remain as it is (as it was before charging)
How to get this done?
CommunityBot
- 1
1
vote
3
answers
2k
views
Computer needs to "rest" after a power outage
My PC normally runs fine.
After a power outage or a short-circuit, however, it can't be turned back on until some significant amount of time (>1 hour) passes. My case has LEDs that are on even when ...
- 1
1
vote
0
answers
948
views
Is it safe to plug a power USB C hub on Desktop PC?
My situation is, if I have a USB C hub which I am connecting to my desktop PC and the hub is trying to support many devices all drawing power. As USB C ports typically only supply a low power from the ...
- 11
0
votes
1
answer
1k
views
Computer turns on and then off after a few seconds when front panel is connected, but works normally without it
My computer is almost 3 years old by now, and last night I noticed it turning on and off randomly for a few seconds, multiple times. I tried to turn it on to investigate, but it didn't react to the ...
CommunityBot
- 1