Looking for an external power supply for mini itx, HTPC External Power

Im trying to find ( and failing epicly ) an external power supply unit for my htpc build, my build specifications are listed below. I do not have my motherboard or tv tunner yet as the motherboard will be released in Mid November. I need to find an external psu something like the picture posted which is a PicoPSU-150-XT ( which is a 150 watt psu ) but I want to make sure that 150 will be enough for my application, All the 200 watt internal connectors are too big for my case so if I need more than 150 watt I will have to get an internal psu. UNLESS someone knows of some that looks like the picture only in a 200 watt. Really I even wonder if I could just get away with using the picopsu-150 watt power adater, as I have no clue as to what the wattage usages are between my components or how many watts an atom n330 motherboard even uses.


Operating System - WINDOWS 7 Ultimate
Case - Lian Li PC-Q07 Mini-ITX Case
HDD - Western Digital WD500AAKS ( 500GB x 1 )
Ram - Corsair 800mhz CM2X1024-6400C4 ( 2GB x 2 )
Optical Drive - 5.25 Full Size HD-DVD / BLU-RAY Drive ( Sata connected )
TV Tunner - Hauppauge WinTV-HVR-2250 Dual TV Tuner ( PCI-Express x1 )
Motherboard - ZOTAC IONITX-G-E ( 1.6 GHZ Dual Core Atom N330 )

Motherboard specs can be found at the link below :

PicoPSU specs can be found at the following link :

There is an internal psu extender mount available for my case at the link below:
4 answers Last reply
More about looking external power supply mini htpc external power
  1. Actually theres a problem with your build. The Zotac Ion boards do not come with a true pci-x slot. Its actually a mini pci-x slot for a network card. Most zotac HTPC builds need to use a USB type tuner or a network based on like the Homerun and Hava. You can actually get the zotac board with an external 90w PS which is plenty for what your looking for here
    http://www.newegg.com/Product/Product.aspx?Item=N82E16813500027&cm_re=zotac_ion-_-13-500-027-_-Product. You can get a PCI slot with the ASUS ion board though which is also available http://www.newegg.com/Product/Product.aspx?Item=N82E16813131408&cm_re=asus_ion-_-13-131-408-_-Product. A 150 watt power supply is plenty for this setup also.
  2. That would be true if you didnt look at the board inforfmation at the link i posted, the board I choose has BOTH, a mini pci meant for wifi, AND a regular PCI-E x 1
  3. Well your link was bad....and I missed it when i searched for it so was wrong there. Either way 150 watts should be more than enough.
  4. Hi,

    I have a mini-PC that has Atom 230 prosessor/Intel GMA 950 integrated graphic/1 Gt memory/160 Gt 3,5" hd/DVD-RW drive/Win XP Home.

    The power supply is only 65 watts (external). I installed ATI Radeon 4350 videocard for the pic-e x1 slot. The specs say that the HD4350 takes only 20w at max. I tested with my electric power meter and my mini-pc used only 30 w on the desktop view. Now I have the HD 4350 videocard installed and the pc still works (unluckily my electric power meter doesn't work any more so I cannot say how much my mini-PC is taking energy now) so it'll probably take about 50 watts of power (I guess the power supply's (65w) energy efficently is about 80% of the 65w so it'll be 0,8x65=52w).

    On the board I have one pci-e x1 slot where was a wlan card. I replaced it with the HD4350 videocard. Though I had to cut the slots back away so I could install the pci-e x16 card. I tested with 3dMark2001SE. With the integrated Intel GMA950 the score was about 2350 points -> using the HD4350 the score increased to 6990 points!

    I don't know how much Atom 330 Dual core will need power, but if I manage well with my 65w power supply and I have add-on videocard, I think that you can manage also with 120w to 150w power supply.
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