Thanks nukhem...
I alrady do a research with two different PSU and YES, it really depend on PSU.
System spec: i3-6100T, 8GB DDR4 single stick, GIGABYTE GeForce GTX 1050 Ti D5 4G, Samsung 950Pro m.2 NVMe 256GB SSD
OS: Windows 10 Pro, idle
Dell 245W OEM - 20W IGD - 25W GTX
Seasonic 360W 80+ Gold - 15W IGD - 20W with GTX
Notebook type 120W external PSU with power distribution board from Chenbro ES34069 (similiar to picoPSU) - 11W IGD, 16W GTX
Unraid generally pull a few watts more. Even under full load (3DMark benchmark), whole system didnt exceed 100W - thats really impressive, my previous PC (i7-3820) pulls 100W on idle.