Computer shuts down after 5-10 minutes

August 23, 2013 at 16:45:28
Specs: Windows 7, Intel Core i7 Lynnfield 2.93 GHz / 8 gigs.
Hello. I'll try to provide as much information as possible and thanks for your help; I am completely stumped on this...

So this is a computer I built myself just over 2 years ago. I just replaced the power supply (it is 2 days old) and I know the computer is not dusty (I have cleaned it out already) or overheating (CPU is not over 40C). I am running Windows 7 64 bit.


Western Digital WD Black WD1001FALS 1TB 7200 RPM 32MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive

2 x CORSAIR XMS3 4GB 240-Pin DDR3 SDRAM DDR3 1600 Desktop Memory Model CMX4GX3M1A1600C9

COOLER MASTER Silent Pro Gold Series RSC00-80GAD3-US 1200W ATX 12V v2.3 / EPS 12V v2.92 SLI Ready CrossFire Ready

BIOSTAR T5 XE CFX-SLI LGA 1156 Intel P55 ATX Intel Motherboard

2 x XFX Double D HD-687A-ZDFC Radeon HD 6870 1GB 256-bit GDDR5 PCI Express 2.1 x16 HDCP Ready CrossFireX Support Video

Intel Core i7-870 Lynnfield 2.93GHz LGA 1156 95W Quad-Core Processor BX80605I7870

Any other information that is needed I would be happy to provide. Thank you.

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August 23, 2013 at 17:29:37
Boot to BIOS and let it sit for a while. If it shuts down while in BIOS, it is hardware related. In this case, I would first test to see if it is the memory by removing one memory stick at a time and seeing it it remains on while in BIOS. If it does, it is probably the memory, but you can verify this by running Memtest from a bootable CD on one at a time.
If it runs in BIOS for an extended period of time, try booting to Safe Mode. If it works in Safe Mode, run a System Restore to a date when all was running properly, followed by a scan with Malwarebytes, a manual Windows Update, and a manual driver update (I prefer to not let Windows Update do driver installs/updates).
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You have to be a little bit crazy to keep you from going insane.

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August 23, 2013 at 18:10:57
It still shuts down in Safe Mode, but I will try removing the RAM and see if one of those is the problem.

EDIT: I booted it up in BIOS and it has been running for over 20 minutes without shutting down. Is that a long enough period of time to assume it is not a hardware issue?

DOUBLE EDIT: It actually just shut down right after I typed that (I am on my laptop). Start by removing the RAM one at a time?

message edited by Salvitor

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August 24, 2013 at 05:19:13
"I just replaced the power supply"

Why was it necessary to replace the PSU?

"Start by removing the RAM one at a time?"

Have you tested the RAM with memtest86 as suggested?

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August 24, 2013 at 06:06:16
The suggestion of removing one of the memory sticks at a time was based on your system not staying up for more than a couple of minutes. If the system stays running in BIOS for 20 minutes, running Memtest first is generally a better choice, then if there are errors, remove one at a time to confirm a good one and a bad one. If Memtest is not able to complete, you may still want to do this and note that any errors before crashing/restarting may be enough proof to point to bad memory. Like your BIOS, Memtest uses only a small amount of memory for itself (unlike Windows) so that it is less likely to have problems running.
If you still prefer removing one first, it will give you only part of the picture so though you can do this first, I still recommend running Memtest on each stick to verify the assumption.

You have to be a little bit crazy to keep you from going insane.

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