Computer shuts off within 5 minutes of being turned on

Alright guys, I've exhausted all the ideas that I can think of to try and remedy my situation.

Here's the back story:
Back in February I purchased an AMD Radeon R9 280X video card. I previously had an MSI something in the computer. I uninstalled all drivers for the video card, swapped the Radeon in and installed everything. The computer was running great, got some really nice benchmarks with it and then about 3 weeks in the computer would abruptly shut down with no warning while running intensive applications. I had a Diablotek 600W Gold 80+ power supply. My first guess was that the power supply was not enough to power my computer. I limped the computer along being able to use it for up to an hour or two as long as I was only using it for things like Word and internet for school. I finally got the money to purchase a larger power supply, a Corsair 860 Platinum 80+. Just installed that this morning and the computer ran for about 5 minutes before again shutting down with no warning. No loud fans or sluggish GUI.

I thought that maybe something wasn't seated properly; so I took my memory out, my video card out, pulled my CMOS battery and replaced it, took the CPU heat sink off and unseated the processor, checked for bad pins and then put that back in. I then plugged everything back in and made sure everything was seated properly and connected all my cables again.

Then I went in to bios and checked temps, my CPU is running at 67-70 Celsius and my motherboard is running at about 45-50 Celsius. My case fan, GPU fan, and CPU fan are all running, and I increased them to turbo speeds in case the computer was overheating.

After all this I turned the computer on, went online to download Hardware Monitor, installed that and then after about 3 minutes the computer shut down again.

I'm at a loss and can't think of what else to do or try. I'm thinking of getting some thermal paste to try, maybe the paste that's left isn't enough or working any more?

My specs:
ASUS M5A99X EVO AMD 990X AM3+ Motherboard
AMD FD6100WMGUSBX FX-6100 Processor
Patriot PG34G1333EL Gamer 2 Desktop Memory Module - 4GB (2 of these)
Seagate 1TB Serial ATA Hard Drive

I also have the following plugged into my computer:
2.5TB external hard drive
x8 USB hub running a wireless mouse transceiver, a web cam, and a phone charger.

This was my old card: MSI R6770-MD1GD5 Radeon HD 6770 Video Card - 1GB, GDDR5
This was my old PSU: Diablotek PSDA600 DA Series 600W Power Supply

Any help or ideas would be greatly appreciated, I'm trying to get this thing running smoothly again so that I can work on a photoshop project and work on some of my Visual studio projects.

9 answers Last reply Best Answer
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  1. Is the CPU fan running all properly?
  2. Best answer
    I think you're on the right track with thinking the CPU is overheating. 70c at idle speeds is very high. I'm not surprised you are crashing when gaming. My guess is that your temps are getting too high and the cpu is shutting itself off before it cooks. That's the first thing I'd do is clean off the thermal paste, and apply some new and see if that doesn't fix you up.
  3. @Turkey: The CPU fan shows up as running at about 3000 RPM's, I didn't actually physically get down and look to see if it was running, but if it's reading speeds I'm assuming it's working?

    @Jim: Alright, I can't think of it, but is there anything special I should use to clean the heat sink surface with when I take the paste off, or just use a small cloth? And any specific brand thermal paste or is something at Best Buy or Walmart going to suffice?
  4. You need to use something to remove the current paste. Usually rubbing alcohol (isopropyl alcohol) is used. I've even used unscented nail polish remover from my wife, but you do need some type of solvent to remove the old goop. I typically use a Qtip.

    There are many different brands of thermal paste, but the difference between them is minimal. If you want to get the best, here's a good article by Toms. In summary it says it's not so important which brand you get. Most important is the method you use to apply it. Most people use the 'pea' method. Apply a drop about the size of a pea (or uncooked grain of rice) at the center of the CPU, then sit the heatsink on top and let the weight of the heatsink naturally spread the paste as you tighten the fasteners.,3616.html
  5. Alright, I'm going to go get some at the store and report back within an hour or so. Cross your fingers for me hah hah.
  6. Ok, so I went to best buy and purchased some Antec Formula 7. This was all they had and it was $11. I also purchased an additional 120mm chassis fan and just mounted that to the side of my case. I cleaned the heatsink and the CPU core of old compound, and put the new stuff on after carefully making sure there was no lint or oil. I put the heatsink back together and plugged in my new fan. I'm on my desktop right now and it's been on for about 5 1/2 minutes so far. CPU is at 45Celcius for right now.

    Oh and I cleaned the CPU fan on the heatsink, it was working but I pulled it off and cleaned it anyway.

    Should I leave it idle for a few hours so the compound will settle and form? Or should I test it by turning on a game or intense program?

  7. *Update*
    CPU @ 38C
    MOBO @ 24C
    VIDEO @ 18C

    What is the TMPIN2? It's reading 128C!?
  8. TMPIN2 is just an unused sensor, nothing to worry about.

    Sounds like you are in the clear! It's safe to game etc. Glad it's all fixed up :D
  9. Yes it's been running since yesterday evening, when I got up this morning I came in and it's still up and running with temps below 30Celcius! Thanks for the additional info and reassurance of doing the reapplication of thermal paste. I'm betting that I could have gotten away with only fixing the overheating issue and not had to purchase a new $250 power supply, however this one is awesome. I love the fact that all the cables are plug-in so you only need to put in the power cables that you are actually using, reducing clutter in the case.

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