Ok, I realize you make be speaking English as a second language but we still need more detail to your problem. Make a list of your current hardware or model of your prebuilt system.
From what I can get from your partial statement I think you need to start by going into the BIOS and checking your settings.
Explain in more detail please...
------------------------------EVGA 780i mobo | EVGA GTX 275 | Q9550 OC @ 3.6Ghz | 8Ghz 1066Mhz Corsair Memory | Corsair 1000 watt PSU | Coolermaster Stacker CM830 Case | Ultra TEC CPU Cooler | Vista Ultimate 64
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