Random BSODs, low 5v..?

Asustek computer inc. / P5n-t deluxe
January 10, 2011 at 06:11:33
Specs: Windows 7, 3.42 GHz / 4096 MB
Hi,

About very long ago, my pc started to random give me BSODs, at the time i had my Q6600 running @ 3GHz (380x8), oddly enough my CPU and RAM were totally stable without errors after 12 hrs of prime and memtest, so first thing i tried was upping voltages of the chipset on the mobo, then also upped the vcore, all with no avail...

I then realised the BSODs happened less frequently when i upped the RPM of the cpu fan, altough temperature wise nothing should have been wrong @ lower RPM...

But then after a while the higher RPM also didnt help anymore, and the BSODs started to show up again, i then decided to put the cpu back to stock frequency (2,4GHz 266x9), which seemed to get rid of the problem, my system has not showed any BSOD in the last few months, untill a few days ago...

Now i suddenly get bomdarded by BSODs again, all random, system can be stable for hours, only to later crash every other minute..

Now since my CPU and RAM still show up as stable in prime & memtest, i'm suspecting the Mobo or PSU, i noticed my 5v rail is a little on the low side, bitween 4.67v / 4.73v
Could this be the origin or the problem? i have my doubts cause of the randomness of the BSODs, if it was low on power shouldnt it instantly crash when i fire up a demaning game like Crysis? ..in games it crashes just as randomly as when browsing the web.
Plus, PSU is a Tagan Piperock 1100Watt which cost me like 250 bucks, not a cheap psu at all, but also expensive things are able to fail i guess..

So what do u guys think?
Thanks in advance.

Intel Q6600 @ 3GHz
Asus P5N-T Deluxe
4GB OCZ DDR2 1000
eVGA GeForce GTX 285
WD Velociraptor 150GB,
2x 320GB,16MB in Raid0
Tagan Piperock 1100W
Thermaltake Kandalf


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#1
January 10, 2011 at 13:03:52
BSOD's are one of the most difficult things to diag. Anything from voltages, to OS, to firmware to solder joints, to esd, to efm/rfi and who knows what.

How did you decide the voltage? DVTM of bios reading?

I'd run a live linux cd maybe and see if it is stable. Better still a bartsPE or VistaPE. If they seem stable then look to the OS. See event logs.

Memtest for 12 hours seems to prove much of the hardware is OK. Mgiht look at setting bios to failsafe or default.


Can't say what happened to the system when you over clocked it.

Why did it take me over a year to phone in a problem to ATT?


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#2
January 11, 2011 at 11:59:12
Yeah i read the voltage from bios or monitor app, i do not own a device for precise reading...

Also, what would be the use of seeing if linux is stable? i want windows to be stable which it isnt cuz of hardware failure, i've tried bios defaults + reinstall of windows, OS failure has been ruled out.

Anyway, i'm gonna put my powersupply in a few different systems and see what 5v readings i get, if they look normal i'm gonna reflow my motherboard, i've got nothing to lose anyway, can't work like this...

Thanks for quick reply:)

Intel Q6600 @ 3GHz
Asus P5N-T Deluxe
4GB OCZ DDR2 1000
eVGA GeForce GTX 285
WD Velociraptor 150GB,
2x 320GB,16MB in Raid0
Tagan Piperock 1100W
Thermaltake Kandalf


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