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Computer Randomly Shuts down. Usually during game play.

Last response: in Motherboards
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April 22, 2014 6:31:01 AM

Hi all,

I built a computer for my daughter and Its having random shutdown issues. What will happen is she will be playing and the screen will go black and the whole computer will be off. I've tried different drivers and re-installation of windows. I've also checked the event logs and I couldn't pinpoint the failure to a specific component.

Here are the system specs:
Rosewill CHALLENGER Black Gaming ATX Mid Tower Computer Case
ASRock 970 EXTREME3 AM3+ AMD 970 + SB950 SATA 6Gb/s USB 3.0 ATX AMD Motherboard
AMD FX-4170 Zambezi 4.2GHz (4.3GHz Turbo) Socket AM3+ 125W
G.SKILL Sniper Series 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1866 (PC3 14900)
Rosewill HIVE Series HIVE-650 650W Continuous @40°C, 80 PLUS BRONZE
EVGA 01G-P3-1556-KR GeForce GTX 550 Ti (Fermi) FPB 1GB 192-bit GDDR5 PCI Express 2.0 x16

I don't overclock or do anything of that nature. Can anyone please help me correct this issue?
a b V Motherboard
a b À AMD
April 22, 2014 6:41:36 AM

Do you have the chance to swap out the power supply and test another one?
This usually happens when the power supply goes nuts.
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April 22, 2014 6:44:12 AM

fkabs said:
Do you have the chance to swap out the power supply and test another one?
This usually happens when the power supply goes nuts.


I'll give that a whirl. I just happen to have a known good power supply which I pulled from my old build. I'll let you know how it goes.
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a c 129 V Motherboard
a b À AMD
April 22, 2014 6:46:14 AM

You could also try resetting CMOS and reseating RAM (try with one stick at a time in different slots). Also, download HWMonitor and keep an eye on your temps while the system is under load.
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Best solution

a c 283 V Motherboard
a b À AMD
April 22, 2014 7:02:25 AM

Clear CMOS.
Load UEFI Defaults from BIOS Exit menu.

DRAM Configuration (page 41 of manual)
DRAM Frequency
If [Auto] is selected, the motherboard will detect the memory module(s)
inserted and assigns appropriate frequency automatically.
Change to [DDR3-1866MHz]

DRAM Timing Control
Set the first four values starting with CAS# Latency (tCL) to 9-10-9-28

Run Memtest86+
http://www.memtest.org/
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April 25, 2014 7:33:45 AM

So far setting the RAM clock speed and timings has worked. Interestingly enough, the ASROCK bios didn't not automatically detect the RAM correctly. It automatically selected DDR3-1600MHz. Stepped it up to 1866 as suggested and the bios automatically selected the correct timings once this was accomplished.

So far my daughter has reported no new random reboots. I'll post again if anything changes. Thanks all for your input.
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