Solved

Power Supplies

Posted on 2006-11-01
1
334 Views
Last Modified: 2010-04-26
Doing some reading right now about desktop computers it mentions that the power supplies monitor the qulity of DC voltages it supplies to the rest of the PC.  If this voltage drops below an acceptable level, the power supply unit lowers the voltage to the motherboard.  If so, the computer simply resets itself and begins computing again when the voltage returns to a suitable level.  Is that saying it is rebooting, or is it saying it is putting the process or computer on hold until it gets the level to the proper voltage?  And it is also saying that the voltages are +12, +5, -5, and -12.  Are they no longer using 3.3V?
0
Comment
Question by:William Richardson
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
1 Comment
 
LVL 9

Accepted Solution

by:
jasonr0025 earned 50 total points
ID: 17855604
will pc restart or standby-- it will restart.   Most cpus/mbs are very sensitive to voltage swings and most pcs will simply reset when 12v --(which ultimately powers cpu)--swings to high or low.  
Are the still using 3.3v--yes but I don't think that it is a monitored voltage in the sence that the p/s has built in active monitoring and correction.

If you look at the 20 - 24 pin m/b connector on some p/s you will notice that pins 11 and 20 or 13 and 20(varies widely) may have 2 wires running to one pin.  One of these wires are voltage and the other (usually smaller) wire is monitored by hardware in the p/s (transistors) that use this voltage as a signal to maintain proper voltages.  
Hope this helps
0

Featured Post

Salesforce Has Never Been Easier

Improve and reinforce salesforce training & adoption using WalkMe's digital adoption platform. Start saving on costly employee training by creating fast intuitive Walk-Thrus for Salesforce. Claim your Free Account Now

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Stuck in voice control mode on your Amazon Firestick?  Here is how to turn it off!!!
Arrow Electronics was searching for a KVM  (Keyboard/Video/Mouse) switch that could display on one single monitor the current status of all units being tested on the rack.
In this video, viewers are given an introduction to using the Windows 10 Snipping Tool, how to quickly locate it when it's needed and also how make it always available with a single click of a mouse button, by pinning it to the Desktop Task Bar. Int…
There's a multitude of different network monitoring solutions out there, and you're probably wondering what makes NetCrunch so special. It's completely agentless, but does let you create an agent, if you desire. It offers powerful scalability …

636 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question