I suspect a power supply that's not up to the job. Although the card only requires a 300 watt minimum power supply, machines were noted for cheap junk power supplies. If you want to post what the specs are that might help to narrow it down. The info can be found on the label on the side of the power supply. Especially what it says about the 12 Volt info.
I think you read that wrong. It uses 115 volts, which is standard power from your recepticles in your house. Europe uses 220 volts. Look at the label on the side of the power supply and see how many WATTS it is.
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