380w火牛夠唔夠推我部機

要推HD4850最少要有450W左右電源供應,你380W唔夠,就算足火都未必夠推,下面嘅Antec 380W唔多夠,建議買500W以上加埋有80plus認証嘅火牛

最好450W - 500W
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For your components listed above, it is good enough. However; it depends on what other harddare will be installed on the computer too, such as how many DVD drive, harddrive. You have to add the extra hardware, check the power consumption data provided by hardware.

Most of the hardware will show you the required Watts, if it is just show you the Amp information, using this equation to find the Watts information of each piece of hardware.

Watts = Amps x Volts

In HK, the house current is 220 volts:
If your hardware required 1Amp of power
then 1Amp x 220V = 220 Watts

Most of the harddrive consume around 3 watts to 5 watts.