CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > CFX

PC restarts suddenly

Register Blogs Members List Search Today's Posts Mark Forums Read

Reply
 
LinkBack Thread Tools Display Modes
Old   March 13, 2005, 15:27
Default PC restarts suddenly
  #1
Fabian
Guest
 
Posts: n/a
Hi!

Im running CFX 5.7.1 on a Pentium IV 3.2 GHz HT with 1Gb RAM and suddenly my pc restarts by itself during simulation.

Have anyone already experienced this??
  Reply With Quote

Old   March 13, 2005, 17:48
Default Re: PC restarts suddenly
  #2
Glenn Horrocks
Guest
 
Posts: n/a
Hi,

Your PC is sick. Contact support for your PC, or if you feel brave you can have a shot at it yourself. Download the latest drivers for things like graphics cards, hard drives, BIOS etc etc and if you are lucky you will fix it. If you are unlucky you'll stuff your computer up even more.

Glenn Horrocks
  Reply With Quote

Old   March 13, 2005, 18:57
Default Re: PC restarts suddenly
  #3
Jeff
Guest
 
Posts: n/a
The solver maxes out the CPU at 100% and can cause heat problems which can either 1) cause the CPU to shut down, or 2) reboot the machine, or 3) on older NT systems give the blue screen of death. I've seen all three of these.

Before getting into detailed re-installs and expensive service calls, make sure the dust is swept out of the machine (especially the CPU fans) and that there is proper venelation to the machine (i.e. it's not sitting up against a wall or a desk that's blocking the vents).

Jeff
  Reply With Quote

Old   March 13, 2005, 21:54
Default Re: PC restarts suddenly
  #4
Kiddo
Guest
 
Posts: n/a
You may use the super pi (http://www.computerbase.de/downloads...arks/super_pi/) to test your cpu at 100% and see if it will still shutdown. If yes, then you should clean or replace your CPU fan.
  Reply With Quote

Old   March 14, 2005, 05:25
Default Re: PC restarts suddenly
  #5
Charles
Guest
 
Posts: n/a
It can be any of a number of things. Heat is certainly a possibility and can give some really weird problems, I've just been through an experience where the machine would reboot itself about 5 minutes after starting to edit one specific Word document, but not others. It had no problem running a CFD simulation at 100% of CPU & memory for an hour .... Wiggling the recently refitted CPU heat sink around a bit cured the problem. I guess there was a hot-spot where the heat sink / thermal grease wasn't seating properly. I've also encountered the reboot problem with poor quality memory, I strongly recommend getting top quality memory modules. It can be time-consuming to trace which memory module is at fault. I've also encountered this problem due to a faulty motherboard, where a dual-CPU board was fine when only one CPU was plugged in, but with a second one it rebooted after a while. Replacing the board was the only option.

There is no simple answer, and your desktop support people are unlikely to have a clue, you will get better help from an overclocker! You need to systematically swap parts in and out untill the problem has been identified. Yes, it is a pain, but in my experience it is just as much part of a CFD engineer's work as understanding fluid dynamics, turbulence models and differencing schemes.
  Reply With Quote

Old   March 15, 2005, 08:06
Default Re: PC restarts suddenly
  #6
Akin
Guest
 
Posts: n/a
I have had on of the pc's in my cluster restart itself, the problem seems to be bad memory/heat problem (linux). Another time windows resatarted itself, but I think it was an update issue
  Reply With Quote

Old   March 15, 2005, 16:05
Default Re: PC restarts suddenly
  #7
Walid
Guest
 
Posts: n/a
There is a problem in your operating system (OS) obviously which relates to somehow of accumulation of hidden works until you system failure. Try to check that with the Microsoft if you've installed it.
  Reply With Quote

Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
when the angle of attack =?, the total lift coefficient begin to decrease suddenly liujmljm Main CFD Forum 6 August 3, 2012 05:46
Emptying a container suddenly? Is there a name for this topic? bzz77 Main CFD Forum 0 August 21, 2011 07:57
Velocity blows up suddenly after 30,000+ iterations lordvon OpenFOAM 14 October 27, 2010 11:13
Residue suddenly goes infinite. Michael Main CFD Forum 1 November 6, 2006 02:43
Linux: when the job suddenly stops working. Stevie Wonder CFX 3 August 15, 2004 18:36


All times are GMT -4. The time now is 09:01.