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Power Supply keeps Blowing


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Unread 24-10-2012, 06:08 PM   #1
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Windows 7

Power Supply keeps Blowing

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

• 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
• 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

• 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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