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Which PicoPSU for N54L?

Green PC, UPS, Power saving, etc.
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sts
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Which PicoPSU for N54L?

#1

Post by sts » 29 Jul 2015 10:20

Hello everybody,

currently I run a nice little N54L with the following "extensions":
- 10GB ECC-RAM
- 2x 3TB WD Red as ZFS-Mirror
- 32GB SanDisk SSD as system drive
- IcyBox IB-170SK mobile rack (via eSata to Sata adapter cable)

The IcyBox is for inserting my two alternating backup HDDs (send/recv method, one stored at home, one at the office).

Recently we moved, and now the NAS has to stand near my working computer. Just 1.5m away from my ear, the N54L is quite loud. So I decided to change the PSU and go the PicoPSU way. But I don't know which one I should take.
Is a 120W Pico (with 120W brick) sufficient? Or should I take the 150W? When the latter, do I also need a 150W brick, or would the 120W brick suffice?
I know the N54L has a power consumption of under 50W when running, but I'm scared of the boot peak. The data sheet of the WD Red says 1.75A peak @12V with 0 @5V. That would be 21W(?). The brick's datasheet says 120W with 10A (respectively 150W with 12,5A).
And maybe I want to insert one or two more WD Reds in the future (different/second zpool).

Can a 120W Pico handle the load (even with 4 WD Reds)? Or should I go for the 150W? IF 150, would a 120W brick suffice? It would only had to handle the boot peak in "overload" I think. Or am I wrong? I'm a bit at a loss...

Thank you very much in advance.

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b0ssman
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Re: Which PicoPSU for N54L?

#2

Post by b0ssman » 29 Jul 2015 12:22

use this formula from the unraid forum

2 amps (24 watts) per green drive and 3 amps (36 watts) per non-green drive on the 12 volt rail.
5 amps (60 watts) for the motherboard on the 12 volt rail.

since the price difference between the pico psu units is minimal. go got the 160xt version
http://www.mini-box.com/picoPSU-160-XT
the picopsu wont fit like this. you will need a 24pin extension cable.

an alternative is (wont fit 100% but it will fit see german site http://www.hardwareluxx.de/community/f1 ... 52079.html)
http://geizhals.de/fsp-fortron-source-f ... 00452.html

also the 120mm fan is quite loud. consider replacing that as well. you will need to modify the connector.
http://www.silentpcreview.com/article1193-page7.html

according to the hardwareluxx site some people are running it with a 120w brick.
you can plug in a 120w brick into the 160xt. and if you need more juice just buy a new brick.
Nas4Free 11.1.0.4.4517. Supermicro X10SLL-F, 16gb ECC, i3 4130, IBM M1015 with IT firmware. 4x 3tb WD Red, 4x 2TB Samsung F4, both GEOM AES 256 encrypted.

sts
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Re: Which PicoPSU for N54L?

#3

Post by sts » 31 Jul 2015 09:27

So well, slept another night over this topic.
Because the Pico more or less just loops through the 12V rail I'd say the brick is much more responsible for stability. So I decided to spend some more money on it than a usual off-the-shelf Leicke&Co.
At the end I ordered a PicoPSU 150W (to avoid the extension cable) and a Bicker TRG150A.
(Together with a Noctua NF-S12A FLX, intentionally no PWM, which will be installed with the L.N.A. for 900rpm, or maybe even with ULNA @600rpm)

Hopefully a good decision....(?)

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b0ssman
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Re: Which PicoPSU for N54L?

#4

Post by b0ssman » 31 Jul 2015 09:56

sts wrote: At the end I ordered a PicoPSU 150W (to avoid the extension cable) and a Bicker TRG150A.
the problem is the height of the pico psu.
it wont fit under the drive cage without the extension cable.

its about 3mm to tall.
Nas4Free 11.1.0.4.4517. Supermicro X10SLL-F, 16gb ECC, i3 4130, IBM M1015 with IT firmware. 4x 3tb WD Red, 4x 2TB Samsung F4, both GEOM AES 256 encrypted.

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