I meant the power that my mobo has. What can it power ? headphone wise
Totally depends on what headphones are you willing to buy/ have.
Not everything is about the Impedance of the headphone... I can give you an example.
My
Sennheiser HD650 300 Ohm headphones are actually easier to drive compared to the
62 Ohm AKG K712 Pro pair I also got. The other factor that actually plays a big part in this is the
Sensitivity of the headphone... it basically indicates how loud the headphone gets based on a certain level of power given from the source (amplifier, onboard audio).
Sensitivity is measured in db SPL(Sound Pressure Level) / mW or in some cases db SPL/V.
Another example where the impedance is not really...