Ӕ Central

Welcome to the hidden lair of AE Central. From cars and beer to hardcore software development, you might find interesting topics in all areas. Feel free to browse!
Home

To menu | To search

Passive power supply (PicoPSU clone) in HP Proliant MicroServer

, 23:12 - Permalink

Server messagesThe HP Proliant Microserver was a hit when it appeared on the market. Due to its capabilities it is still a perfect candidate for a low-cost SoHo server, NAS or HTPC. Most users who replaced the stock power supply had problems with the noisy fan and simply fitted a new 1U PSU or swapped the fan itself. For me this was not an option.
After a day of drilling, soldering, screwing and testing I am really happy to announce my next achievement: I successfully installed a passive 12V power supply instead of the stock one in a HP Proliant Microserver!
The PicoPSU is a passive power supply for ATX machines, which (usually) requires an input voltage of 12V DC. Due to its design it's more efficient than the old, noisy ones; plus it places most of the heat generated outside of the chassis resulting a much more cool, stable system to work with.
 
The unit comes with strictly basic accessories: one motherboard cable (with a MOLEX, a SATA and a floppy drive connector) and one power input cable. The first thing I had to do is to make a 1 female - 4 male MOLEX splitter, since the PicoPSU has only one of this and the backplane of the MicroServer gets the power from 4 connectors behind the HP logo. Stripping down an old AT power supply left me with more than enough parts, only a little bit of soldering and assembly was required. Remove the stock PSU by undoing the 3 screws on the back and simply sliding it out to the front. The next step was to find a location for the PCB in the chassis. Unfortunately the motherboard cable was really short, so I had to "leave it hanging" at the place of the expansion cards - fortunately I have none. To make sure nothing will short anything out I cut a piece of plastic and attached it to the PCB. The last thing to do was to cut a small sheet of metal to cover the holes left on the back.
As a last, cosmetic action I cut the unnecessary connectors off, leaving myself more space to tuck everything back in the tight box.
 
Fitting a PicoPSU is basically a old-out-new-in, but expect challenges during the process. It took me about 2 hours from shutdown to startup; including mid-phase tests and making the small cover as well. As for the sizing I advise to measure your needs before ordering one: with 3 HDDs and 1 SSD; without any expansion cards the PicoPSU sucked less than 5 Amps, meaning a total of 60 Watts. Since my power brick is 120W and the PCB can handle 180W I think I clearly oversized everything - at least I have enough room to grow :)
 

Comments

1. On 2018.04.26, 11:55 by Nathaniel Ingold

One of the best blog

Add a comment

HTML code is displayed as text and web addresses are automatically converted.

This post's comments feed