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.

Filter by
Sorted by
Tagged with
3 votes
1 answer
713 views

Intel DH61AG CPU, fans, and voltages not reading in BIOS

I'm looking for the cause and/or fix of an issue when during start up of the DH61AG board the fans go full speed as they normally do but stay at full speed rather than slowing. In the BIOS the PC ...
greggmi's user avatar
  • 1,275
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 ...
Neil's user avatar
  • 13
8 votes
1 answer
19k views

Charge Apple computers bought in USA to use in Europe

I bought an Apple MacBook in the US and would like to use it in Italy. On the cable, it says: 2.5A 125V. What are the possible solutions to charge my computer? Use an adapter, a plug converter or an ...
Hoang Pham's user avatar
0 votes
1 answer
2k views

Voltage on PC case is making problem

With test light I can detect voltage on my desktop pc case and I believe it's the reason that my HDD fails some often or my pc hangs. When I connect my case to ground (metal door frame) it works with ...
Ali Shakiba's user avatar
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 ...
Artur Carvalho's user avatar
13 votes
3 answers
34k views

Is it better to use an offset or manually set CPU voltage (with respect to CPU longevitity)?

The Background: I recently built a new computer, and I'm working with the ASUS P8Z68-V Pro motherboard and Intel i7 2600k processor. While this question does not pertain specifically to my hardware, ...
Breakthrough's user avatar
  • 34.5k
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 ...
Somebody still uses you MS-DOS's user avatar
0 votes
3 answers
12k views

How does voltage fluctuation affect a laptop

I own an Acer Aspire 3680. In the past 2 years, I have given, my laptop for service due to the same kind of problem. Last year at the same time, I gave my laptop to the service center. They repaired ...
user avatar
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 ...
bbaja42's user avatar
  • 3,031
2 votes
1 answer
311 views

Does the power consumption for non-scaling processor vary from idle to busy?

Even though newer processors come with scaling (SpeedStep, Cool'n'Quiet), some computers have motherboards with outdated bios which do not support the feature. Thus, they run at full clock speed. Even ...
syockit's user avatar
  • 772
2 votes
1 answer
963 views

Do motherboards automatically set memory voltage?

Let's say I have a motherboard whose stock PC3200 DDR memory modules are fed a standard 2.6 V. I now replace them with performance sticks, which according to the manufacturer need to get the "...
Bo Real's user avatar
  • 25
2 votes
2 answers
287 views

Usefulness of multi-core in the context of power-efficient computing

I'm considering options for a new portable PC. I'd like to keep power utilization at a minimum, while being able to run batch jobs as quickly as possible. Batch jobs I can generally parallelize ...
intuited's user avatar
  • 3,371
0 votes
1 answer
2k views

Windows 7 power management -- vCore goes from 0.9V to ~1.30V

I have a brand new computer (built yesterday) with an AMD Phenom II X4 965 on an ASUS M4A89GTD Pro motherboard. Today I noticed heavy vCore fluctuations: between 0.90V (idle) and ~1.30V (load). CPU-Z ...
Martin Törnwall's user avatar
1 vote
3 answers
3k views

Should I be concerned about this voltage reading (via SpeedFan)?

Been having computer issues. (My computer has been freezing the past couple of days, but in a rather odd manner: once it starts, each program freezes after a couple of seconds of being used. Note that ...
snarf's user avatar
  • 531
2 votes
2 answers
3k 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. ...
Michhes's user avatar
  • 81
1 vote
1 answer
68 views

Random lockups with my new build

I have been having random lockups with my new build. The game will lock up, then the monitor refreshes and it goes back to normal... Lowering the graphic settings helped significantly in WoW, but now ...
JumboShrimp's user avatar
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) ...
squircle's user avatar
  • 6,717
3 votes
2 answers
27k 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 ...
Chris W. Rea's user avatar
  • 10.8k
31 votes
2 answers
304k views

Hooking up my power switch/reset switch/LEDs

I'm working on building a computer (first time for me). There are several plugs that I need to connect to the motherboard (Power LED, reset switch, etc). Of the two wires, they are either: Color ...
David Oneill's user avatar
  • 2,660
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 ...
Earlz's user avatar
  • 4,494
0 votes
1 answer
58 views

Does the speed of memory define its voltage?

What I'm asking here is, if I order PC3200 memory is it all going to be 1.8V, or will some be 2.5, some 1.8, etc... I don't mean variation within a specific part #, but rather across part numbers, is ...
Zak's user avatar
  • 230

1 2 3
4