Questions tagged [voltage]

Voltage is the measure of electrical current. This tag should only be used when asking questions related to powering computers and peripheral equipment. It is not for asking about voltage issues related to the commercial supply of power to your home or office.

42 questions with no upvoted or accepted answers
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1answer
792 views

Ever have bad voltage on an ethernet jack on a router/switch?

So I've got a bit of an odd problem I'm trying to solve. I have an ASUS RT-N66U router which has a desktop, xbox, and my brand new NAS directly wired into it. Whenever I hook the brand new NAS up ...
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0answers
87 views

PSU voltage and microfreezes

A week ago, my PC started exhibiting a problem. When scrolling in a web browser or trying to game, microfreezes happen randomly. The PSU is five years old, and some of the voltages look out-of-spec, ...
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0answers
791 views

Is it safe to use non-genuine laptop's battery

I own an Hp pro-book 430 G2 Laptop, While I found batteries compatible with this model they weren't exactly the same. My battery is RA04XL while What I found has RA04 written on it. Both batteries Li-...
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2answers
168 views

Serious voltage and temperature problems

My computer has been acting up when I play games so I wanted to look into why. Issue 1: GPU Temp According to afterburner and speedfan my 8800GTX idles at 90 degrees and then when playing games ...
2
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1answer
712 views

UPS switches to battery power when plugging in devices?

Over the past week or so I've had my UPS switch over to battery power briefly when plugging in new devices (possibly limited to just AC -> DC chargers, but haven't tested anything else). I had ...
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2answers
71 views

Why does RDIMM-type memory require less voltage from the CPU?

I have read the following: https://www.anandtech.com/show/6068/lrdimms-rdimms-supermicros-latest-twin/2 https://en.wikipedia.org/wiki/Registered_memory https://www.pcmag.com/encyclopedia/term/62658/...
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0answers
63 views

12v from Notebook Mainboard to attach 3.5 inch HDD

I plan to build a low-budget low-power home server, mainly as a NAS. My first Idea was to simply use a RPI 4, it has USB 3.0 and Gbit Ethernet, but I think the hardware is too slow to be fun. For ...
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1answer
3k views

How to detect what wattage that my Windows laptop is receiving via USB-PD?

I don't know too much about USB-PD. I understood that USB-PD requires negotiation between the charger and the receiver. So probably my Windows laptop (Dell XPS 9570) should be able to know the current ...
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262 views

Laptop charger voltage

I bought a laptop from the US. Now the part that connects from the power brick to the wall socket says 7A 125V. Unfortunately, the end that goes into the wall socket does not fit. So I replaced the ...
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1answer
70 views

Laptop quit charging, needs new charger but which one?

I have an HP Pavilion g6-2211nr I got it about 2 years ago. This last couple of months i havent been able to use it because It stopped charging. For a while It would if i held the cable a certain way ...
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0answers
1k views

5v rails is getting 5.7v even with new PSU

I need help. I'm on my mobile typing this so i'll be word efficient. (English is not my native language and I only have a basic understanding of pc's) What's the problem? After the weekend I tried ...
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0answers
202 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 ...
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1answer
449 views

CPU voltage settings set in BIOS always stay the default

Default voltage is 1.5v.It can be set to the highest setting (1.55) or even to 0.8v but the voltage always is 1.5v. How to make it 1.55v? Can I somehow make it higher than listed there (like 1.6v) ...
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6k views

Acer aspire battey pin diagram

I have an Acer Aspire laptop and it has a 6 cell Ar4920LR laptop battery, I need to figure out what two pins are used for charging the laptop battery. Can anyone take the battery out of anyone and ...
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361 views

1.8 VDC POWER remains on USB after SHUTDOWN (HP Compaq Pro 4300 SFF - Product ID: QZ219AV)

I am having unexpected opportunities with a USB Device failing to properly initialize on startup after a shutdown, which seems to be caused by residual power remaining on my USB Ports (after shutdown)....
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30 views

Does SSD still go into idle mode if booting OS from it?

I am trying to find out whether a SSD will go into idle despite linux (or any OS for that matter) is running on it. I would think a SSD only goes into idle if used as a secondary drive and have no ...
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1answer
54 views

Powering my laptop from DC to DC converter?

I use my laptop Lenovo Y700 on solar system, but much energy is wasted when converting DC power to AC and then back to DC. So I bought a 12V DC to 20V DC converter. Is it safe? Or may it damage my ...
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1answer
27 views

Liquid spill Keyboard & Mouse = risk for the PC?

Great Monday start with my coffee spilled on my mechanical keyboard and my mouse... I tried soaking up as much as possible but didn’t open them up to see. For the keyboard when I removed the keys and ...
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72 views

low voltage POST only means battery problems?

No doubt the watch battery on the motherboard long since lost its juice. However, I'm not quite sure what error I saw on boot, I think it was before POST and I think it mentioned "low voltage&...
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30 views

Low voltage readings in BIOS and other weird readings

I have an older ASUS H97 Plus mainboard (using an Intel Xeon processor), never updated the bios. Two or three years ago I started getting Surge Protection warnings so I replaced the PSU. Today I ...
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0answers
335 views

12v line is showing up to 14v in BIOS (DMM reading are fine)

Purely by chance, upon rebooting, in the BIOS, I saw that 12v line was showing 13.9v, although I used the computer normally all day long. After resetting all settings in the BIOS and reboot, nothing ...
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77 views

Does the voltage supplied to a CPU differ per core?

I'm currently trying to find a range of safe voltages for CPU overclocking. As a start, I looked at the automatic stock voltages: Without any Turbo-functions, the voltages in this case range from 0....
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0answers
84 views

Abnormal voltage range and frequency activity on Intel 8550U

I have recently purchased a secondhand/refurbished HP laptop with i7-8550U CPU and MX 150 GPU. The first thing I noticed is that it runs unreasonably slow on games, much slower than my other i7-8550U +...
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132 views

Thermistor to Celsius/Fahrenheit/Kelvin in MATLAB

Thermistor to a Temperature Unit in MATLAB I am using an Analog Read Pin on an Arduino Uno to read the temperature as given by a thermistor. The resistor being used on the thermistor is 220𝝮. What I ...
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39 views

What do I need (powerwise) to plug my French gamer PC in Canada

I read on metastack that superuser is the place to ask hardware related stuff, hope it fits. I recently move from France to Canada and I'm going to get my gamer PC shipped soon. What will I need to ...
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276 views

Console powers off and powers on in quick succession. Insufficient current? Voltage drop?

I have a question about a specific setup I have. I have a Nintendo Classic Mini console, this console: requires 5V/1A through its USB 2.0 micro-B female connector to power the console outputs ...
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0answers
948 views

Asus M32 desktop motherboard will not power on. Unknown purpose of its “VRM_BOOT” pins

My Asus M32 desktop will not power on after a power outage. The CPU fan does not spin and there is no video output when the power button is pressed. I've used 4 different power supplies to try to get ...
0
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1answer
263 views

Right Voltage, still not charging

My charger died a bit ago and even after ordering a new one with the exact same Voltage (19.5v) and Amps (4.62a), the laptop does not charge. Is there something that needs troubleshooting, or has ...
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1answer
168 views

checking desktop power supply voltage range.

I have a few computers. I know some of the power supply is 110-220 and some are only 220. I need to figure out which ones are which. How do I do that? I can't seem to find it in the control panel. Is ...
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722 views

Power adaptor seems to be outputting too high a voltage

I'm in a country with an unreliable national electricity supply, where staff in the compound in which I live run a generator at certain hours if there's no national power. Recently, the generator ...
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0answers
83 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 ...
0
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1answer
91 views

Hi I would like to know if modules (2gb each) of G Skill F3-12800CL7 are compatible with Intel® NUC Kit D34010WYK

I would like to know if modules (2gb each) of G Skill F3-12800CL7 are compatible with Intel NUC Kit D34010WYK. That because of the voltage: the NUC does not support 1,5 V but only 1,35 V. I would ...
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1answer
583 views

Overclocking AMD Sempron +2400

Basically, I wanna ask is there a safe way to overclock AMD Sempron 2400+ processor to 2.0GHz (Stock - 1.67GHz, Single core). Now it's running @ 1.8GHz and 1.5something V, as I run it @ 2.0Ghz it ...
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0answers
386 views

How to test laptop adapter voltage with a Digital Voltage Detection Screwdriver Test Pen

Couple of days ago I replaced my laptop adapter, and when I use that, some amount of current discharges through the sockets,ports...etc (i.e. audio out). So I checked the adapter with a Test Pen (I ...
0
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1answer
72 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 ...
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0answers
2k views

Laptop battery 10.8V vs 11.1V

I've had my HDX 16 for about 3 years now, and I've been using the batteries quite intensively last year. I'm getting warnings about the battery needing to be replaced before boot and in Windows. ...
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1answer
506 views

Laptop Battery: Can High Voltage Damage?

I am looking to buy a new battery for my Toshiba Satellite L10 But I have a problem. On the website, it says only compatible with 14.4 /14.8 volts, but my computer is 19 volt. Does this matter? Will ...
-1
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1answer
133 views

How do I evaluate which RAM to buy as an upgrade?

Hello i have 2x4GB ddr3 rams operating at 1.35v here you can see http://gyazo.com/b7ce756c365d94e871aa7753f2c89319 im getting 2x4gb dd3 new ones http://www.amazon.com/gp/product/B00J8E8ZLK/ref=...
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2answers
3k views

In trying to fix my laptop power adapter, current is going through the wire but the laptop will not charge?

My laptop power adapter has recently stopped working (will no longer charge my laptop), and I would prefer to fix it if possible, instead of putting a couple hundred bucks into a new one. I used a ...
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2answers
4k views

Charge a laptop with lower voltage

I want to charge my laptop using a 19V connector from a turtlebot. It has a special "Laptop charging connector" that delivers 2 Amps at 19 Volt (I measured 18 Volts though). I have a Lenovo that ...
-2
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1answer
599 views

Will an external battery power bank power an mini-ITX board (~200W)?

I was planning to build a laptop from scratch, and I've found some good DC-DC converters that allow you to use an external power source to power a standard desktop board (in this case a mini-ITX). The ...
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1answer
153 views

Do i need voltage stabilisers for Computers and other electronic devices without motor?

Searching on internet i've found this article https://www.bijlibachao.com/appliances/voltage-stabilizer-for-television-refrigerator-air-conditioner.html Where i've read that electronic devices and ...