New PC random crashes

February 4, 2009 at 19:14:31
Specs: Windows XP PRO, E5200/2GB DDR2 800
Hi to all.
I'm helping a friend buying a brand new computer.
We got everything and I assembled it.
The computer is random crashing. Sometimes during boot, sometimes right after XP is loaded, sometimes after installing drivers.

The computer goes as follows:

Mobo: Asus P5QL SE
Ram: Kingston DDR2 800Mhz Value Ram
HDD: Hitachi 500GB SATA 2
DVD-RW: Asus DVD-RW Sata
Graphics: Asus ATI4850 1GB PCIex16

PSU: 500W almost new 1 year old, but crappy brand (Might be the problem?)

Testing goes as follows.

Memtest OK
Memtest of the same RAM on another computer OK
Memtest of diferent RAM on this computer OK

HDD tested on another computer OK
Didn't test another HDD on this computer, don't have any SATA HDD spare.

ATI tested on another computer works fine.
My old 6600GT on this computer and still crashes.

Tested another 500W PSU on this computer and it crashed. But also not a good PSU. Althou this PSU has higher Amp. on the rails.

Motherboard: Flashed the BIOS for the latest version and still crashes. Faulty mobo?

I don't have any spare 600W or 700W PSU to test if in fact there is PSU problem.

My friend doesn't want to spend money on a new PSU unless we are sure that 500W is low.

What you guys think?
Low power PSU or bad mobo?

Thanks

Once upon a time the floppy disk was king.


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#1
February 4, 2009 at 19:17:33
Forgot to mention.
I bench test the system of course.

The crashes happen with mobo on the table or on the case!

The case is also new but i doubt is has anything to do with the problem.

Once upon a time the floppy disk was king.


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#2
February 4, 2009 at 19:29:16
If the system crashed during benchtesting, it never should have been installed in the case. I assume you ruled out overheating?

You supplied details on all the components except the PSU. "Crappy brand" doesn't mean a hell of a lot & neither does "this PSU has higher Amp. on the rails". 500, 600 or 700W means nothing. A high quality 400W unit will run that system. Post the info about the PSU's you're working with....brand name, model, wattage & amperages on the +3.3v, +5v & +12v rails.


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#3
February 4, 2009 at 21:00:10
I benchtested after installing in the case!

I still worried if its mobo faulty!

As for the PSU goes as follows.

My friend PSU:

Brand: Deer
Model: DR-8500BTX
+3.3V: 22A
+5V: 16A
+12V1: 15A
+12V2: 16A
-12V: 0.8A
+5VVSB: 2.5A

My PSU used for testing:

Brand: ???
Model: LPK12-23
+3.3V: 28A
+5V: 38A
-5V: 0.5A
+12V1: 20A
+12V2: none
-12V: 0.8A
+5VVSB: 2A

Thanks

Once upon a time the floppy disk was king.


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Related Solutions

#4
February 4, 2009 at 21:02:50
And yes. I ruled out overheating.
Since I can't get a read in windows due to the crashes.
Using BIOS monitor:

CPU: 24ºC
Mobo/system: 22ºC

Also right after crashes i touched the cooler with my hand, Its cold not even warm.

Thanks

Once upon a time the floppy disk was king.


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#5
February 4, 2009 at 21:22:11
"Also right after crashes i touched the cooler with my hand, Its cold not even warm."

That doesn't sound good, the heatsink should be hot or at least very warm. If it's not, means the heat is not being transferred from the CPU to the heatsink. Did you follow the instructions on installing the thermal compound or pad.

FWIW to XP users: When you click on the 'Command Prompt' you are just causing the 'Command prompt' to be displayed. This prompt gives you access to NTVDM.EXE, the 'NT Virtual DOS Manager'.


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#6
February 4, 2009 at 21:52:56
Yes. The Cooler is properly in place.
When I suspected CPU overheating I removed the cooler, cleanned both cooler and CPU apply new thermal compound and placed the cooler in place.

Its not overheating if it was overheating the computer would probaly crashed in BIOS or during post.

Once upon a time the floppy disk was king.


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#7
February 5, 2009 at 16:55:25
Hi again!
And thanks to all.

Tomorrow i'm going to trade the board.
But about the PSU's specs above that jam asked.

Jam, can you give your opinion on those PSU's?

Thanks

Once upon a time the floppy disk was king.


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