Is running a controller and sound card on USB power a risk?

[traktorboy]

yes mate im running it all on the laptops usb ports, and i have had no problems.
regards
traktorboy

[Wuz]

it really depends on your laptop and what you use.

I ran a VCI-100 and an NI Audio Kontrol 1 from my asus laptop with no problems, as soon as i added a Korg PadKontrol it was too much (too many leds). I had to use a powered hub for the Korg or the AC adaptor for the VCI-100.
The soundcard and the VCI malfunctioned on the hub, It was a decent Logitech one aswell.