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Random PC Freeze - Help crack this one!

This is a discussion on Random PC Freeze - Help crack this one! within the RAM and Power Supply Support forums, part of the Tech Support Forum category. SPECS: Motherboard: BIOSTAR TF720 A2+ nForce 720a CPU: AMD Phenom 9950 2.6GHz 125W Black Edition RAM: OCZ Platinum 4GB (2


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Old 02-19-2009, 03:14 PM   #1
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Mistake

SPECS:

Motherboard: BIOSTAR TF720 A2+ nForce 720a
CPU: AMD Phenom 9950 2.6GHz 125W Black Edition
RAM: OCZ Platinum 4GB (2 x 2GB) DDR2 1066
GPU: EVGA GeForce 9800 GT 512MB
Audio: Creative Sound Blaster X-Fi Xtreme Audio PCI Interface
Hard Drive: Seagate Barracuda 7200.10 250GB SATA
Hard Drive: Western Digital Caviar 640GB SATA
PSU #1 (original): COOLER MASTER Real Power Pro 550W
PSU #2 (replacement): Thermaltake Purepower 500W
OS: Windows Vista Home Premium 64-bit SP1


The Problem:

I built this machine for my father who lives 3 1/2 hours away which has made the troubleshooting process a huge hassle.

The PC will freeze randomly, sometimes 2 or 3 times within a couple of hours, and sometimes it will go 2 or 3 days without a problem. The audio will make a glitchy quick noise before the system locks, and the HD activity light is stuck on. It will freeze during inactivity, while browsing the net, listening to music, whatever - it appears to be very random.

The PC never recovers and requires a manual reset. There is no information in the Event Viewer, other than the notification of an unexpected restart, to indicate a problem.


Troubleshooting (unsuccessful):

BIOS and drivers are the most current, and all devices are recognized and operational. CPU temp is idle at 32C - all other temps are good, and the case has 2 120mm fans with excellent ventilation.

I've swapped the motherboard and RAM with identical parts. I've run individual sticks of RAM and performed the integrated Memtest extensively without error. I've swapped the CPU and PSU and run the system with on-board sound and graphics.

Each of these configurations has to be tested until it locks, sometimes up to 3 or 4 days.



Anyone who can give me some helpful advice would be appreciated.


JON
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Old 02-19-2009, 07:24 PM   #2
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My System


Could you post the voltages, +3.3, +5 and +12v when at idle and under load such as playing a music cd and defraging the hdd at the same time?

Run the manufactures utilities to test the boot drive, run the extended test and post results.

Check and make sure the ram voltage is set to the manufactures recommended setting, some times you have to set the voltage manually.

I had a similar system only running a dual core doing about the same thing, after 2 months the hdd failed, it was a segate, replaced it and all was fine
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