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2
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2answers
516 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. ...
0
votes
0answers
671 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. ...
3
votes
1answer
3k views

Is it safe to use a laptop AC adapter with 220V power if the AC cable is not rated for 220V?

The AC adapter supplied with my laptop is designed to accept voltage in the range of 100-240VAC at 50-60Hz, but the AC cable that plugs into the adapter unit itself is only rated to 125VAC 7.5A 2.5A. ...
1
vote
1answer
743 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 ...
3
votes
2answers
511 views

CPUs: more transistors, less voltage?

I have read in an article that newer CPU cores have narrower circuit tracks so more transistors can fit in the core. The author wrote that since there are more transistors, the voltage is reduced. ...
1
vote
2answers
425 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 ...
1
vote
1answer
6k views

Using adapter with higher output voltage?

My adapter is broken, and I'm currently using another one while I'm waiting for a new adapter. The input voltage and amps are the same for both adapters, while there are difference in the output ...
1
vote
2answers
439 views

Using alternate rating laptop charger [duplicate]

I am using Sony Vaio and laptop charger burned its rating was 19.5V-3.9A, i am trying to find the same model but I have been only been able to find one with the rating 19.5V-4.7A. Can I use this, any ...
9
votes
3answers
2k 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 ...
1
vote
3answers
3k views

Can I use 7.5VDC @ 1.0A on 6V @ 2.0A device?

Just what the title asks.... Can I use 7.5VDC @ 1.0A on 6V @ 2.0A device? Anyone know the answer?
0
votes
1answer
164 views

How do you resolve a supply voltage high warning on an optical SFP in a router?

Here is the error showing in my log file on an Alcatel router: 5629 2012/01/15 02:41:24.81 EST MINOR: PORT #2030 Base Port 1/2/8 "XFP/SFP DDM (supplyVoltage-high-warning) raised" When I issue the ...
3
votes
1answer
499 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 ...
1
vote
1answer
1k 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 ...
8
votes
1answer
5k 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 ...
0
votes
1answer
683 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 ...
3
votes
1answer
1k 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 ...
10
votes
4answers
8k 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, ...
2
votes
2answers
1k 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 ...
0
votes
3answers
4k 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 ...
1
vote
3answers
2k 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 ...
2
votes
1answer
206 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 ...
2
votes
1answer
679 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 ...
2
votes
2answers
208 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 ...
0
votes
1answer
1k 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 ...
1
vote
3answers
2k 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 ...
1
vote
2answers
1k 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. ...
1
vote
1answer
56 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 ...
0
votes
1answer
2k 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) ...
3
votes
1answer
7k 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 ...
5
votes
2answers
8k 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 ...
6
votes
2answers
1k 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 ...
0
votes
1answer
48 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 ...