Project: 5.2L MINI PC 250W (Brickless)

Discussion in 'Build Logs' started by LuKO, Apr 13, 2019.

  1. LuKO

    LuKO Efficiency Noob
    Thread Starter

    #1 LuKO, Apr 13, 2019
    Last edited: Apr 13, 2019
    this is my project 5.2L mini 250W brickless PC for my girlfriend.


    MOBO: H310M-ITX/ac
    CPU: Intel® Pentium® Gold G5400 Processor
    CPU Cooler: IS-40X from ID-COOLING
    GPU: GeForce® GTX 1050 OC Low Profile 2G
    RAM: 8GB DDR4 KIT (2X 4GB) 2400MHz DIMM from Kllisre (Aliexpress)
    SSD: Crucial MX300 M.2 2280 275GB SATA III
    PSU: 250W - 12V/ 20.8A LED Power Supply from SANPU (Aliexpress) + 12V 250W Pico PSU from RGeek (Aliexpress)
    CASE: HTPC MINI ITX Case 21*26*9.5cm 5.2L from Aliexpress

    Case need some mods for fit LED PSU ( cut out front panel HDD led ) and IEC C14 Power Plug (drill hole for connector)

    Links for Aliexpress parts:
    12V 250W LED PSU:
    12V 250W Pico PSU:
    IEC C14 EMI filter :

    PS: sorry for my bad english, I am from Slovakia :D

  2. Valantar

    Valantar Airflow Optimizer

    #2 Valantar, Apr 13, 2019
    Last edited: Apr 13, 2019
    Nice build! A word of warning: particularly for the Aliexpress PICOPSU knockoffs, I wouldn't trust them to sustain their full rating - they simply don't have the input or output wire gauge for that kind of wattage. For your build it ought to be perfectly fine, though, as it'll likely be closer to 100W than 200 under load.

    It might also be an idea to stick a filter capacitor across the DC output of the AC-DC PSU - without a datasheet there's no telling whether this is even remotely close to ATX ripple compliance (120mV p-p for 12V), and it's a shame to lose hardware (or more likely, experience instability) due to an out-of-spec PSU.
    thewizzard1 and Soul_Est like this.
  3. LuKO

    LuKO Efficiency Noob
    Thread Starter

  4. LuKO

    LuKO Efficiency Noob
    Thread Starter

    yes i know, that's why i chose a bigger wattage :)
  5. Windfall

    Windfall SFF Guru

    Nice build! Can that case support MATX?
  6. Thehack

    Thehack Shrink Way Wielder
    Bronze Supporter Creator

    The higher wattage does not mean anything, as they fudge the numbers. They add the 5v rail and the 3.3V rail to the rating. PC use mostly 12V rail. This is probably a 120W unit, which is pretty much just enough for this build.

    I think you're on a tight budget and you understand the risks. It looks very good. I am concern for the ac-dc. The ripple on LED psu is generally very poor.
    Soul_Est and Valantar like this.
  7. LuKO

    LuKO Efficiency Noob
    Thread Starter

    yes this case also supports MATX mobo.
    but beware!!! only to size 20x24cm (this means that not all MATX)
    you have to check at the dimensions your mobo
  8. Windfall

    Windfall SFF Guru

    You think the Asrock's X399 threadripper MATX would fit?
  9. LuKO

    LuKO Efficiency Noob
    Thread Starter

  10. Windfall

    Windfall SFF Guru

  11. Valantar

    Valantar Airflow Optimizer

    How would you cool a Threadripper in a case that small anyhow?
  12. Windfall

    Windfall SFF Guru

    More a dream than anything. Or, I could underclock something major.
    Valantar likes this.
  13. Scott

    Scott Chassis Packer

    Server Cooler? If you don't care about noise that is. I also dream of a case that small that could somehow fit a threadripper and cool it
    Windfall likes this.
  14. Choidebu

    Choidebu King of Cable Management

    Hunted down that psu's spec sheet, found that the mfg at least do state ripple of <120mVpp, and <250mVpp for the 24V counterpart.

    The efficiency is pretty bad at 85% though.

    But yeah... do take precaution and don't tax it too much. Great build anyway! Hope your gf likes it!
    dealda likes this.
  15. Valantar

    Valantar Airflow Optimizer

    Your Google-fu is apparently superior to mine. I even messaged the AliExpress seller, which ... well, wasn't helpful :p