Join Date: Aug 2011
Location: United Kingdom
County: North Lanarkshire
It depends in the usage. I could be wrong with my numbers here but a bus powered hub draws its power from the port its connected to so only has 500mA, it can use up to 100mA its self so can only power devices that use 100mA or less (based on a 4 port hub).
This is fine for most devices but devices that use a lot of power might not work on the bus powered one. (main example would be a 2.5" external hard drive that doesn't have a separate power supply)
A powered hub gives the whole 500mA for every port.
So really depends on what its for.
apologies of my numbers are out, i'm sure I'll be corrected if i'm wrong, this is all from memory.
its all fun until something falls off.