Computer turns its self off.

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Brian104

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Sep 17, 2015
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I got a new mother board a few days ago and installed it, put on thermal paste and everything but it will randomly turn off with no warning no shutting down screen just turns off. I don't know why can anyone help please?

PC specs:
Power Supply: Corsair CX430
Motherboard: ASUS A88X-PLUS
CPU: AMD 760K Richland Quad-Core 3.8 GHz
Graphics Card: MSI Radeon R7 260X
Hard Drive: Seagate Barracuda ST1000DM003 1TB 7200 RPM
Memory: Crucial Ballistix Sport 8GB 240-Pin DDR3
 
Solution
S
Motherboards take power too. Its possible your new board uses more than the old one. Especially with those Radeon's, they typically need significant power on the 12v rail of the PSU. I would check that. Use a Kill-a-Watt meter or something similar to see the acutal draw of the system and make sure that you are not using more than the PSU is rated for, ideally you would want to have about 25% headroom in PSU rating, also make sure to test under load as idle power usage is usually a lot lower than in a game or benchmark. Also as you said you just replaced it check to make sure the motherboard is all installed correctly and you don't have anything between the motherboard and the case, sometimes screws and stuff can fall down behind there...
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Brian104

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Sep 17, 2015
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I haven't had a problem until I put in a new motherboard
 
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Sywtch

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Sep 22, 2015
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Motherboards take power too. Its possible your new board uses more than the old one. Especially with those Radeon's, they typically need significant power on the 12v rail of the PSU. I would check that. Use a Kill-a-Watt meter or something similar to see the acutal draw of the system and make sure that you are not using more than the PSU is rated for, ideally you would want to have about 25% headroom in PSU rating, also make sure to test under load as idle power usage is usually a lot lower than in a game or benchmark. Also as you said you just replaced it check to make sure the motherboard is all installed correctly and you don't have anything between the motherboard and the case, sometimes screws and stuff can fall down behind there and get stuck, causing shorts that can lead to weird electrical issues like this.

Also, i would load up a temperature monitoring application and a benchmark and run some 45-60 minute burn in tests to make sure that the temps are normal. Its possible when you reinstalled the CPU there was an issue with the socket/cooler mount/thermal paste.
 
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