No that's definitely not advisable. More expensive interfaces with more I/O will require external power and they have DSP chips which let you monitor standalone.
Asus R500A-RS52, Windows 8, 2.6gHz i5 -3230M, 6GB RAM, 5400RPM HDD
Cubase Artist 7, Wavelab Elements 7, Focusrite Scarlett 8i6, The Grand 3, Melodyne Essential, Korg Nanopad/Nanokontrol, EZDrummer, Samson CO1, Samson HP10, Casio WK-200, Mackie MR5mk2 monitors, and more....
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