Reboot cycle - Faulty PSU?

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Guest

Guest
For the past couple of weeks I've been plagued by random freezes and reboots of my PC. They were initially happening at a rate of around 3 a day. Either the PC would freeze, or it would reboot by itself.

Over the last couple of days, the problem seems to be getting worse, and now around once every 10 or so times I turn on my PC, it gets stuck in a reboot cycle. I press the power button, the computer turns on, then about 1 second later (before any text on the screen) the computer reboots. The turning on and rebooting continues until I pull the power plug out.

I've tried changing the RAM, and using another video card. I've tried unplugging all cards/devices except the graphics card. I've also tried a different graphics card, and also tried a fresh install of Windows 7. This doesn't solve the problem.

It's hard to replicate the problem as the reboot cycle fault seems to come at random intervals, and sometimes I can go 24 hours or so without it happening.

I'm starting to think it may be a faulty PSU, but I don't have a spare one to try or any means to test the current one. The PSU is a Corsair CMPSU-1000HXUK.

Any help will be appreciated!


PC info below from HWinfo:

CPU: Intel Core i7-975 Extreme (Bloomfield XE, D0) 3333 MHz (25.00x133.3) @ 1603 MHz (12.00x133.6)
Motherboard: ASUS P6TD DELUXE
Chipset: Intel X58 (Tylersburg 36S) + ICH10R
Memory: 12288 MBytes @ 668 MHz PC10600 DDR3 SDRAM - Corsair CM3X2G1600C8
Graphics: nVidia GTX 770
Drive: Corsair CMFSSD-256D1, 250.1 GB, Serial ATA 3Gb/s
Drive: ST1000DM003-9YN162, 976.8 GB, Serial ATA 6Gb/s
Drive: ST1000DM003-9YN162, 976.8 GB, Serial ATA 6Gb/s
Drive: Optiarc DVD RW AD-7240S, DVD+R DL
Sound: Intel ICH10 - High Definition Audio Controller [A0]
OS: Microsoft Windows 7 Home Premium (x64) Build 7601
 
Solution
If you tried all to no avail, than your MB may be the culprit as well as your PSU. I know you replaced the RAM, but you may want to check it for once more.

Here is the link : http://www.memtest.org/

You can check your PSU by shorting the green wire with any black wire with a metal wire. Check to see if the fan of PSU running or not. If the fan is spinning than we can say your PSU is almost perfect.

The last resort will be your MB. Good luck.
If you tried all to no avail, than your MB may be the culprit as well as your PSU. I know you replaced the RAM, but you may want to check it for once more.

Here is the link : http://www.memtest.org/

You can check your PSU by shorting the green wire with any black wire with a metal wire. Check to see if the fan of PSU running or not. If the fan is spinning than we can say your PSU is almost perfect.

The last resort will be your MB. Good luck.
 
Solution
G

Guest

Guest


Thanks for the reply and the link. Memory passed with flying colours.

As my PSU is a hybrid modular system, I decided to unplug all the 12v power cables and re-insert them into some of the spare 12v output sockets. I'm sure all the sockets are fed from the same line, but you gotta try, right?! On top of that, I unplugged all the cables going to the motherboard , gave them a quick clean, and re-inserted then. Since doing all that over 24 hours ago, I haven't had a single crash.