Flex-ATX or PicoPSU?

[pixelwave]

I am currently looking into an Intel Atom (in the 25W range .. like C3858, 12C/12T, 25W TDP) NAS Build with 4x 3.5" WD Red NAS HDD's, 1x M2 NVMe SSD, 10Gbe (either onboard like with a Supermicro A2SDI-TP8F or with a Mellanox ConnectX-3 40Gbe PCIe Card).

As I estimate the Idle consumption somewhere between 40-50W I was wondering in terms of PSU what would be the better choice. Looking at efficiency (low added Watt consumption) + long term durability.

For that I can go up to Flex-ATX with my current 3D Printed Case plans ... and I am torn between those two options:

FSP FlexGURU 300W, Flex-ATX (FSP300-57FCB / PPA3004300)
(https://geizhals.eu/fsp-flexguru-300w-fsp300-57fcb-a2203423.html)

Impactics 84W AC-DC Adapter inkl. 130W Wandlerplatine
(https://geizhals.eu/impactics-84w-ac-dc-adapter-inkl-130w-wandlerplatine-ints84130-1-a1151742.html)

Would the 84W Impactics "PicoPSU" be sufficient? I read it also uses FSP components. Currently I am leaning more towards the FSP 300W ... because longer warranty.

 

[Samuel Tai]

Go with the 300W. Your NICs will draw too much power on top of your system for the pico PSU to handle.