PC Shuts Down During Gaming

grapes123

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Apr 19, 2014
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Hi,

I built this PC about 1 and 1/2 years ago. In short, the monitor turns dark and I look at the tower, and it is shut off (interestingly, the USB ports still have power). Afterwards, I just press the power button and it turns on normally.

This has happened two times while playing League of Legends (40-50 minutes into a game) and once while playing Black Ops 3.

Very confused as to what is happening and would appreciate any help!

Here are my PC's specs if they are helpful:
CPU: AMD FX-6300
GPU: ASUS GTX 750Ti
Motherboard: ASUS M5A99FX Pro R2.0
PSU: Corsair CX500
RAM: Corsair Vengeance 2x4GB
Hard Drive: Seagate Hybrid Drive 1TB

Thank you so much!
 
Have you checked the temps on the PC while playing? It is possible you are having a heat issue. Couldn't hurt to clean out the case anyways while your at it.
A hard shut down like this usually means a Hardware issue, which includes heat, so I also recommend a full set of stress tests to ensure all pieces are operating properly.
 
I would check your cpu temps but im also going to point a half shaky finger at that cx500, the cx series a know to be bad PSU and are a tier 4 on tomshardware"s PSU list.

Although the 750ti only recommends a 400w 20a PSU AMD cpus are kinda power hungry so you may be pushing the limit on the CX500 enough to make it unstable.
 

grapes123

Reputable
Apr 19, 2014
13
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4,510


Thanks for the response. I just opened up the case and cleaned out some dust.

How do I go through a stress test? Any programs in particular?
 

grapes123

Reputable
Apr 19, 2014
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Is there any way to lower CPU temperature without dishing out another hundred dollars on a new CPU?

 
stress test programs:
Intel Burn Test, works on AMD, Run for 20 runs with maximum stress.
Prime 95: test for minimum 3 hours on blend test.

OCCT: GPU test with error checking enabled with shaders set to 3 for Nvidia and set to 7 For AMD GPU's.

Memtest86+, download and put on a disk or flash drive and run a a boot device. let this rin for 2 passes minimum.

HDDscan 3.3 for reading the Smart sensors in the HDD's/SSD's.

As for keeping the CPU cooler an after market cooler will do the job. For no OCing to a minor OC either a Hyper 212 evo or Cryorig H7 will do. For heavy OCing then look into the Big air coolers like a Noctua dh15 or a AIO closed loop liquid cooler.
 

bignastyid

Titan
Moderator
Well good chance it's the psu the CX is notorious for causing shutdowns under load and he most common cause ive seen is failing secondary caps. CWT used cheap capxon caps on the secondary side and when they start to fail(which they do often) they can handle the load and the psu shuts down. Could be overheating but in modern systems they start to throttle before they get hot enough for a thermal shutdown and the bios will usually warn you on the next boot that the system had a thermal shutdown.
 

grapes123

Reputable
Apr 19, 2014
13
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4,510


Is there any budget PSU you would recommend in particular? Thanks.
 

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