what power supply do i need?

Loizos Eracleous

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Sep 23, 2014
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i am going to build my first pc

motherboard: ASROCK H61M-DGS RETAIL
processor: INTEL CORE I3-3240 3.40GHZ LGA1155
ram : 4GB

HDD: 2.5" WD 320GB

What power supply i need?How much watts?