New computer build won't start

I am building a new workstation and have a strange issue. When the power supply is set to 115 volts the computer will start, run for a few seconds, then reboot. Also the fans run very slowely.

If I set it to 230 volts, the fans run well but it will not get video, bios or anything. It just sits there doing nothing. No beeps or anything.

I tried 2 different 600w power supplies and I know the CPU is good. Could it be the motherboard, ot even stranger the case?

it is an i5 2500 and a Gigabyte GA-Z68A-D3H. The case is a cooler Master 430 black.
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  1. What country are you in? Don't change the psu voltage from what it is getting :P

    Sounds like you have a bad stick of ram if you are getting a reboot cycle. What ram do you have in it? Try one stick at a time and see if you can get it to post or make sure that the ram is fully inserted into your motherboard.
  2. Thanks. It turned out to me the motherboard so I am good!
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