Doubting about power supply for this system

[TigerXtrm]

I've got a Windows Home Server running right now which I intend to change to a Freenas box. Right now I only turn it on when I need it, but the Freenas box will be on 24/7 and as such I've been looking at minimizing power consumption. System specs:

Motherboard: Intel DG45ID MicroATX
CPU: Intel Core 2 Duo E6600 @ 2,40GHz
Hard Drives: 4 x 1TB, various brands (2 x WD, 1 Samsung, 1 Seagate).
Power Supply: Enermax 400W

Obviously the power supply is overkill but it's what I had laying around at the time. Right now I'm thinking of replacing it with a 200W Pico PSU, but would that power the system suffeciently? Could I go even lower to say 150W?

The Freenas system will be running ZFS RAIDZ.

Looking forward to any input!

 

[TigerXtrm]

Anyone who can help me out with this?

 

[survive]

Hi TigerXtrm,

Take a look at this:

http://forums.freenas.org/showthread.php?6273-PSU-sizing-for-home-file-server&highlight=power+supply

If you go with a PICO PSU pick up one of these:

http://www.monoprice.com/products/p...=10226&cs_id=1022604&p_id=5188&seq=1&format=2

-Will