Sutiable 12v 24pin Pico PSU AsRock J3355B itx

Just got my hands on an AsRock J3355B itx board. I'll be running a second Ethernet card, 8GB RAM and a 16GB SATA DOM, PS2 Keyboard & Mouse and possibly a USB Touchscreen.

Was just wondering if anyone has any experience and or recommendations regarding what sort or wattage I should be looking at, I'm looking at powering it from a 12V DIN rail psu.

Cheers
Rob

I have a J3355B and I doubt that it draws more than 15 watts by itself even setup for LinuxCNC with power management off (the CPU heatink barely gets warm)