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New Build powers down after 6+ hours of gaming

post #1 of 9
Thread Starter 
Asrock Z68 Pro3-M Z68
Intel Core i5 2500K
Gigabyte HD6850 GV-R685OC-1GD
Crucial Balistix 4GB DDR3-1600
Corsair CX500v2 PSU
WD Blue 250GB hdd

Everything is running stock clocks w/ stock cooling
To stress it before I gave it to him, I ran CIV V for 4 hours, Prime 95 for an hour, and Intel Burn Test for 30-minutes.
Temps were never out of hand - cpu about 65c under ITB load


I just built this budget gaming rig for my little cousin about 2 weeks ago.
Twice now, when playing for an extended period of time, the computer powers down suddenly and wont boot back up.

1st time was 6-hours of Civ V
-complete power-off without warning
-he powered it back on but it failed to boot into windows
-after a few attempts, it failed to POST. Lights and fans were normal on the motherboard as far as he could describe.
-Monitor not receiveing any signal.

I called him and walked him through removing the GPU and running from onboard video - it works fine
I had him then put the GPU back in, and again, it worked fine

Now he called me again today - About 3 days later
2nd time was after 8-hours of Skyrim
-this time is said there was a hardware failure - then powered off
-wont post now. Fans and lights are normal. No VGA output and no HDD activity.

I'm going to bring my computer over to his house to swap parts and find the problem... if I can. It's only happening after extended periods of use.

My first thought is that it's a bad PSU
but the video card is open box... maybe the previous owner had this problem?
possibly bad memory?
Maybe my fan profiles aren't working in the bios and it's overheating?

This is the first time I've have problems with a fresh build - any help is appreciated.

*please don't say the PSU isn't powerful enough for the computer
I have had this same model PSU in my sig rig, running CPU @ 4.8GHZ with a GTX580.
It's fine.*
post #2 of 9
Could be Motherboard VRMS or something to do with power delivery
post #3 of 9
Check Power cables to Mobo. The CPU 8 pin power cable may be loose? I would swap out the PSU to begin with.
post #4 of 9
Really sounds like something is overheating. Maybe the PSU fan is faulty?
 
HTPC
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HTPC
(8 items)
 
 
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Hard DriveCoolingCoolingCooling
Samsung 830 Swiftech Apogee XT Rev. 1 EK-FC HWLabs Black Ice GTX 240 and a Koolance HX-CU72... 
CoolingCoolingOSOS
MCP 35X and a MCP 350 Koolance 401x2 Opensuse 12.1 Windows 7 
KeyboardPowerCase
Ducky OCN with cherry blues Antec True Power New 650W Cooler Master CM690 II 
CPUMotherboardGraphicsRAM
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post #5 of 9
......or it could be the power supply. The longer you are playing the game, the more components are heating up within the power supply. More heat = a spiraling down of clean power being delivered to components, it will become more inefficient the longer it is stressed until it causes another component, or itself, enough stress to overheat and have its own issues and shut down. That crappy power supply is likely causing other parts to work under crazy stress and you are likely going to end up with a damaged component. GL, hope it's not it, but if it is, you are killing your own equipment because you are too cheap to spend a couple bucks more for a higher quality unit. Corsair TX650 is always on sale at Newegg and can be found for about 65 with rebate.
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post #6 of 9
Thread Starter 
Just got off the phone with him - it still wont post after removing the VGA or swapping memory sticks.
I don't want him messing around in there any longer than needed as he's NOT computer savvy.

I am packing up my extra computer to head over and figure out what's going on.

Most likely problem right now sounds like
-Bad PSU
-Faulty Mobo
-Bad memory

Thanks for the input all.
post #7 of 9
Almost sure PSU is bad, second place are temps.

PSU is in first place because that's a low end Corsair PSU, and while Corsair PSU's are great, they have different manufacturers for each different tier. All I can tell you is that CX-series are not made by Seasonic. Probably 12v rail overload or overheating.

Second place are temperatures because the norm is that if the temperatures are reaching critical levels (CPU) it throttles back down to cool itself down. But there may be some critical chipset that is overheating or something. Is the case well ventilated and with good cable management? Is the case in a good position to receive fresh air?
     
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[Samsung] 4GB 1333MHz  [Corsair] 4GB 1333MHz [Patriot] Pyro 60GB Sata III  [Western Digital] Scorpio Black 500GB 7200rpm 1... 
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[Lenovo] DL-DT Drive [Microsoft] Windows 7 64-bit SP1 Professional Kubuntu 64bit 11.10 [LG] 15.6in 1600x900  
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post #8 of 9
Thread Starter 
Quote:
Originally Posted by experience333 View Post

Almost sure PSU is bad, second place are temps.
PSU is in first place because that's a low end Corsair PSU, and while Corsair PSU's are great, they have different manufacturers for each different tier. All I can tell you is that CX-series are not made by Seasonic. Probably 12v rail overload or overheating.
Second place are temperatures because the norm is that if the temperatures are reaching critical levels (CPU) it throttles back down to cool itself down. But there may be some critical chipset that is overheating or something. Is the case well ventilated and with good cable management? Is the case in a good position to receive fresh air?


It seems like a PSU issue. It should be plenty of power for the system (I use the same w/ a 2600K and GTX580 without a problem)
Might just be a bad egg.

I will be checking it out tomorrow and looking for hot-spots with my infrared spot thermometer while swapping with known good hardware.
Good thing I have 3 computers laying around for parts. lol
post #9 of 9
Thread Starter 
Update:

I stopped by his place today. Swapped the PSU, GPU, Memory, re-seated the CPU and tested outside the case, tried a different monitor.
Inspected the motherboard top to bottom for defects, bent pins, smells, burns, or missing tiny bits.
Nothing is working.
So, it's either a bad CPU or Bad Motherboard
I'll swap out his CPU with my 2600k do determine the final problem.
Good thing I work a few miles from Microcenter.

Thought I would update.
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