Desktop Computer keeps shutting itself off

I came home and my desktop computer was frozen/locked up on my desktop like a freezeframe on video.  I wasn't worried as, although rare, these things happen.  I reset the computer.  Now the trouble starts.  It doesn't even make it into Windows when it shuts completely off.  Now I start to trouble shoot.  I restarted 4 more times and every time between 20 seconds and maybe a minute, it shuts itself off completely.  Next I let it cool down, although it was not hot.  I have a water cooled gaming rig with 5 fans and the power supply fan.  I opened it up and it was a bit dusty inside.  I thoroughly blew all the dust out. I then hooked it back up and hit the power button and it does the same thing.  I tried it 3 or 4 more times and the same thing every time.  I am now assuming that the power supply may have failed, but I wanted to get some other professional advice before I buy a new power supply.  The computer is about 2 1/2 years old.  Gigabyte mother board, 8GB RAM, GTX 660Ti Vid card, 700 watt power supply.  The rig was built with my specs by Cyberpower and has given me NO trouble ever until now.
ArtG2521Asked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

OxygenITSolutionsCommented:
Have you tried rebooting with one memory module, then swap it out, swap the slots, etc to determine if the memory is dodgy.

Is the cover on when you boot?
0
ArtG2521Author Commented:
Cover is on when I reboot. I have not touched the RAM modules. What are the chances ram would fail like that to cause o power outage? When the power goes out it is like someone pulling the plug out of the back of the computer
0
OxygenITSolutionsCommented:
Just trying to eliminate possible causes.

Some 'light' reading has pointed to the power supply.

Out of interest, does it shutdown when you start in Safe Mode?

This from tomshardware.com -

The system was able to post and load the OS. The system allowed me to log-on, but after a few seconds to a minute the system would shutdown w/o notice. I found that after uninstalling the ATI drivers the system was able to load the OS and run without issues. This was also true when booting in Safe Mode. Once the ATI drivers were installed the system would shutdown w/o notice. I thought is was an issue with the video card or a heat issue. Temperatures checked out find. I swapped out the video card and the system failed to boot with a new ATI card and Nvida card. The XFX card ran fine when installed in another system. I began to suspect the MB, so I RMA'd the MB. Gigabyte returned it stating that it passed all tests. Finally I RMA'd the power supply. Corsair sent me a new 750TX, but the same problem kept occurring. Finally, I found this post and followed the suggestion of replacing the 750TX with a different brand. I replaced it with a Thermaltake TR2 RX 750W. The system has been up and running without an issue for the past two days. Thanks for the post. It was very helpful.
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
Big Business Goals? Which KPIs Will Help You

The most successful MSPs rely on metrics – known as key performance indicators (KPIs) – for making informed decisions that help their businesses thrive, rather than just survive. This eBook provides an overview of the most important KPIs used by top MSPs.

Darr247Commented:
If you can boot into Safe mode, start an administrator window and run
chkdsk C: /R
then reboot and let chkdsk run on the c-drive.
0
Gary CaseRetiredCommented:
Symptoms definitely sound like a power supply issue.

One other possibility is an issue with the video card that's causing a shutdown when the video drivers "take over".

Boot to the BIOS and just let it sit for a bit -- does it shut down then?

If not, boot to Safe Mode (as suggested above) and see if it shuts down then.

If it does NOT shut down in those cases, then the next step depends on whether or not you're using a system with embedded graphics or not [i.e. if you remove the video card, will you still get video?].    If so, then remove the video card and test.    If not, I'd get another inexpensive video card and see if that resolves this.
0
ArtG2521Author Commented:
From what you have all told me, it seems like the power supply.  In almost every reboot, I barely make it past the splash screen for the Gigabyte MoBo and then it shuts off.  Out of the 8 or 9 times I tried to reboot only twice did it start to load windows.  The other times it never got far enough to get into safe mode or windows.

If it is PS then what reasonably priced PS should I go for?  I think I would like to go for something more than 700 watt, maybe 750 to 800 watt
0
Gary CaseRetiredCommented:
I'd go for a high quality unit like a Seasonic X series or Corsair HX (or AX) series unit.

There's an excellent price on a 750w HX series right now, thanks to a nice rebate:
http://www.newegg.com/Product/Product.aspx?Item=N82E16817139010
0
ArtG2521Author Commented:
Thanks for the help.  Time to buy a new PS.
0
Darr247Commented:
When you've replaced the power supply and the symptom continues, don't forget to run chkdsk.
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Desktops

From novice to tech pro — start learning today.