Jump to content
dbminter

USB 3.0 HDD power?

Recommended Posts

I should have a new computer in about 2 weeks and it will be my first exposure to using USB 3.0.  I have a USB 3.0 HDD I've been using on USB 2 on my current computer.  So, I have to have the drive's power cable plugged in in order to power it.  However, wasn't USB 3 designed so the USB 3 cable could supply power to the device, too?  If so, does it supply enough power to power a USB HDD?  Will I still need to plug in the power cable to use the USB HDD?

Share this post


Link to post
Share on other sites

It can supply 900mA according to http://en.wikipedia.org/wiki/USB_3.0

 

So that's 400mA more than USB 2.0 I believe. It may or may not be enough to power some hdds. Most enclosures seem to come with a 2 amp PSU though so I doubt it'll work for anything other than a smaller sized 'portable' hdd.

Share this post


Link to post
Share on other sites

Yeah, the drive I'm contemplating, it's not a portable size HDD.  It's a 4 TB, I'm guessing 3.5 inch drive in a USB enclosure.

Share this post


Link to post
Share on other sites

×

Important Information

By using this site, you agree to our Terms of Use.