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Thread: Small HTPC PSU

  1. #1
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    Default Small HTPC PSU

    I just finished my HTPC build. The 200 watt PSU is crap in this Mini-ITX case and makes too much noise. I'm looking at replacing it with a silent fanless picoPSU-150-XT + 150W Adapter Power Kit. It is basically an external DC box and cable with the appropriate converters and adapters. http://www.mini-box.com/picoPSU-150-...pter-Power-Kit

    My question is if 150 watts will be enough. I'm running the following.

    Asus Mini-ITX P8H77-I Motherboard
    Intel Ivy Bridge Core i3-3225 (55W TDP)
    OEM heatsink
    2x4GB Kingston 1600 DDR3
    1 500GB 7200rpm 3.5" Hitachi HD

    I'm hoping to swap out the hard drive with a 750GB 2.5" drive to minimize noise and vibration. Not sure if it's safe to go 5400rpm instead of 7200rpm since its my DVR and will be recording three HD feeds at once. Any thoughts on if this 150 watt PSU should be enough would be greatly appreciated. I think it should be fine considering the biggest power draw is the CPU at 55 peak.

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    More than fine.

    The HDD is 2-3 watt in average. Either 5400rpm or 7200rpm doesn't make a big difference here.

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    Default

    More than enough. You're looking at well less than 100w there.

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    That's what I assumed. Should I downsize to the 102watt version? I hear the DC Adapter gets super hot so if I can downsize even better. Just don't want to be pushing near max on a tiny PSU.

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    Default

    100w is more than enough, too.

    If you pull out full 150w, the adapter's going to be hot. At 20-30w, which is more likely to be your case, it is no big deal.

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    Thanks. Yeah I see that the processor is pulling about 40-45 watts under normal conditions. Would the 100watt adapter be running hot with that load and the rest of the system? Don't want to burn down the house. The adapter will be on polished cement behind my media cabinet.

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    Default

    Quote Originally Posted by ViperJPB View Post
    Should I downsize to the 102watt version?
    I think their 102W brick has a fan in it, FWIW.
    Zap
    Clan of the Bloody Fist

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