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PSU Kills Motherboard

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Last response: in Components
March 22, 2012 9:49:52 AM

I bought a OCZ SXS2 700w PSU to replace an old 230w for an old Pentium 4 motherboard.

When i switched on it booted up for 5 seconds, a large 'pop' occured and i could smell burning. Now it's dead. Are high end PSU's not compatable with old motherboards?

More about : psu kills motherboard

March 22, 2012 10:32:36 AM

well thats nothing that I have ever heard of before, are you sure it was hooked up correctly? I mean that is like super overkill for what your setup is but i wouldn't think it would like overpower and wreck the motherboard.
a c 159 ) Power supply
March 22, 2012 10:44:47 AM

The PC will only draw as much power as it needs to run the won't overpower the system by using a PSU with a higher rating than you need. You'll operate it outside the sweet spot for effiicency, but a non defective PSU won't kill your PC simply by being more than you need. Some older OEM PCs like Dell and HP did use proprietary wiring configurations for the PSU/mobo; it's possible that you ran into this type of issue. Most modern PSUs are designed to fail before they kill the PC, I'm not sure if you'd prefer to kill the PC or the PSU in this case...
What are the specs for the PC you installed this PSU into?
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March 22, 2012 11:08:42 AM

The system i used the new PSU on 'was'..

Asrock P4VMB AGP 8X Motherboard
Pentium 4 (3.0 ghz)
2x512mb DDR1 (Generic)
200GB WD Hard Drive
4XDVD Writer

It's a custom build from years ago that worked fine (aside from the old 230w PSU that was making a racket, hence the upgrade)

Powering it up after the initial 'accident' results in a slight movement of the PSU's fan and nothing else..

Is it safe to assume the new PSU is fine? (it powers up the switch on light and a external hardrive light)

I plugged the PSU into the 20 pin and used one the 4pin plugs for the CPU.
There are numerous 4 pin power plugs that come with the new PSU some i imagine are for powering multiple GPU's (SLI etc..)

March 22, 2012 12:04:03 PM

Well i don't want to run the risk of warranty issues so i won't be sticking safety pins in plugs etc, and with my recent luck i'd probably mess that up and lose my eyebrows or something..

I'm having the offending PSU returned (EBuyer) and i'll just have to get a new system.
Thanks for all the replies. Appreciated.