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I have blown 4 Power Supplies Help!


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#1 Al Bundy2

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Posted 24 October 2012 - 01:18 PM

Help! My work computer keeps blowing Power Supplies!

The computer was bought about a year ago. About a half year ago, I gave it some upgrades including a graphics card, RAM and a Power supply to power the graphics card (See Below for Specs).

Just recently the aftermarket PSU blew which was a Star Tech AP-600F12V 550W. I took the machine to the local shop and they replaced the PSU with a new one, a Star Power YA-700-Q 600W. About a week later that PSU blew.

And when I saw the PSU blew, it makes a loud “POP” sound, everything shuts down and there is a smell of burnt electronics.

So after those two PSUs had blown, we decided to try a PSU with a good name, we installed a Corsair CX600 600W. About a week later that one blew.

After that I removed the graphics card and reinstalled the original stock PSU which was a Bestec ATX-25-12Z 250W. A week later that one blew.

There are several other computers in the building that are on the same electrical circuit and none of them have had any problems. Also I am using a surge protecting strip that the computer is plugged into.

There doesn’t seem to be any noticeable shorts on the motherboard. We did wipe the board down after this last one blew, because for a while we were working with a material containing carbon fibers that became airborne. I know that carbon fiber can conduct electricity, but it wasn’t evident that the fibers had entered the computer.

Does anyone have any ideas as to why this computer is killing power supplies?!! I just got a replacement PSU from Corsair but I’m afraid to use the computer before this issue is resolved. Any recommendations? I know basics about electricity but I’m not very computer savvy, so please any input/suggestions at all would help, Thanks!




Here’s the computers original specs:

Model: HP Pavilion p7-1026 (B)
Running Windows 7 Professional

Motherboard:
• N-Alvorix-RS880-uATX (Alvorix):
• Manufacturer: Foxconn
• Form factor: uATX
• Chipset: AMD 785G
• Memory sockets: 4 x DDR3
• Front side bus speeds: 1333/1066/800MHz
• Processor socket: AM3
• Expansion Slots
o 1 PCI Express x16 slot for graphics card
o 3 PCI Express x1 slots
o 1 PCI Express x1 minicard slot
Processor:
• AMD Phenom II X4 840T:
• Operating speed: 2.9 GHz (up to 3.2 GHz turbo)
• Number of cores: 4
• Socket: AM3
• Bus speed: 4000 MHz HT3

Memory:
• Amount: 6 GB
• Speed: PC3-10600 MB/sec
• Type: DDR3-1333
Memory upgrade information (as specified by HP):
• Dual channel memory architecture
• Four DDR3 DIMMs (240-pin) sockets
o PC3-8500 (DDR3-1066)
o PC3-10600 (DDR3-1333)
• Non-ECC memory only, unbuffered
• Supports 1GB, 2GB, and 4GB DDR3 DIMMs
• Supports up to 16 GB on 64-bit systems
• Supports up to 4 GB on 32-bit PCs
*32-bit PCs cannot address a full 4.0 GB of memory.
Video Graphics:
Integrated graphics using ATI Radeon 4200
*Integrated video is not available if a graphics card is installed.
• Integrated graphics using ATI Radeon 4200
• Integrated graphics: concurrent use of the DVI and VGA ports is supported.
• Also supports PCI Express x16 graphics cards*

Here’s the upgrades as mentioned above:
RAM: from Crucial (2) 4 GB strips same speed as stock.
Graphics Card: XFX R6770 Core Edition PCI Express 2.1 1 GB GDDR5

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#2 dpunisher

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Posted 24 October 2012 - 03:03 PM

Help! My work computer keeps blowing Power Supplies!


Pics? Videos?

Seriously though, I would throw that replacement Corsair at it. It has overamperage protection so if there is a short somewhere, it should shut down. The only real place carbon fibers would be a problem is if they got pulled into an open expansion slot, or uncoated electrical board. If it was mine, I would use some compressed air and blow the whole case out. Hard drive boards as well and especially any open expansion slots. Start with a system you know is clean.

With the exception of the Corsair, those power supplies are not the best in the biz. Depending on OEM, they range from OK to garbage. The Corsair is the only one I can find any reviews on. The CX430/CX430V2 are my go to PSUs on replacements and low end builds. Installed a lot of them, and no returns yet. Imagine the CX600 has a decent rep as well.

I would tend to chalk this up to bad luck, and mediocre PSUs. Couple decades ago, (about 1996)I went through 3 PSUs in 6 months on one build. I remember that one. After that run of bad luck, I have never lost another PSU on any personal RIG.

Good luck with it.

I am a retired Ford tech. Next to Fords, any computer is a piece of cake. (The cake, its not a lie)

3770K @4.5, Corsair H100, GTX780, 16gig Samsung, Obsidian 700 (yes there is a 700)


#3 dc3

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Posted 24 October 2012 - 05:16 PM

With the number of PSUs that you've gone through I would start looking for a short between the motherboard and the case. A short between the two can produce results like this.

Just out of curiosity, did anyone look inside the other PSUs to see if there was an internal fuse, and if it was blown?



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#4 cee134

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Posted 26 October 2012 - 08:10 PM

I need to point out that the PSU you are buying is around 550-600W and the PSU that comes with the PC is 250W. That is a big difference.

Also it may be the power socket your using, if you can you may need to check that. Have you tried different power sockets? What cable from the wall to the computer are you using, have you tried a different one?

Have you checked to see if you have any jumpers set incorrectly?

If you have blown 4 PSU, then it's not the PSU, it's something around it, either between the MOBO or the wall socket. I would guess the wall socket because you haven't blown your MOBO, however if your jumpers are not set correctly, that could effect things as well.

Edited by cee134, 26 October 2012 - 08:16 PM.





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