the hub has 2 power sources. the own USB 3.0 Cord attached and the external power supply. is it 100% neccessary to use the external power supply?
1694990
Only if you want to provide power to a USB device that you plug into the hub.
1694991
It appears to have two version. The version I received has same USB 3.0+2.0 ports like in the picture. But the DC adapter that mine came with has detachable connector to the USB hub but it only has one output 2.1A which is mini DC connector head. Doesn't use USB cable to charge the USB hub. The DC adapter shown at Amazon has two DC output connectors using USB cable to connect to the USB hub. If you refer the DC adapter shown at Amazon, you may ended up getting a different version like what I received.
2020841
The hub itself can use an ac adapter (not included) however it is not required from my experience. But, if your external drives use an external power such as a ac adapter then yes you would still need the power for those drives but not for the usb 3.0 hub itself. You would only need to power the hub itself for power hungry applications. I currently have a WD Ultra Passport external drive (which requires no external power) and two external disc drives attached to mine (one lightscribe dvd writer, and one asus bluray writer drive) each of which is powered seperatly by ac cord. My 4 port Sabrent USB 3.0 Hub has no power to it other than the computers bus power. I hope this helps. Cheers! The hub itself can use an ac adapter (not included) however it is not required from my experience. But, if your external drives use an external power such as a ac adapter then yes you would still need the power for those drives but not for the usb 3.0 hub itself. You would only need to power the hub itself for power hungry applications. I currently have a WD Ultra Passport external drive (which requires no external power) and two external disc drives attached to mine (one lightscribe dvd writer, and one asus bluray writer drive) each of which is powered seperatly by ac cord. My 4 port... » Read More The hub itself can use an ac adapter (not included) however it is not required from my experience. But, if your external drives use an external power such as a ac adapter then yes you would still need the power for those drives but not for the usb 3.0 hub itself. You would only need to power the hub itself for power hungry applications. I currently have a WD Ultra Passport external drive (which requires no external power) and two external disc drives attached to mine (one lightscribe dvd writer, and one asus bluray writer drive) each of which is powered seperatly by ac cord. My 4 port Sabrent USB 3.0 Hub has no power to it other than the computers bus power. I hope this helps. Cheers! « Show Less
474735
No, I draws its power from the mother board. You may be thinking of USB hubs, which often require external power. Hope this helps.
1016769
I have used two of my USB 3.0 ports to use it. One for power the other for data.
1647312
I suspect that you could plug one of the USB cable into an external power source. The question is, "which one"! I would suggest trying the plug on the end to your computer first, then the 2nd plug, (the one with the short lead), to the power source. However, if this does not work, then swap the 2..... One of the plugs is for power only, (no data line in that one)..... However, when all else fails, add a cheap, 2 or 4 port "active" hub to your computer, then plug a couple of your other USB devices to the HUB.... This can cost less than $20.00 This wireless adapter works so well, adding a small hub still makes this adapter the ONLY way to go wireless!
377432
The hub has a 12 volt, 2 amp power supply. I assume the amp capacity is divided among the 4 ports. You'd need to find out what the current draw is of the external drive to be sure.
2151264
The recommended way is to use a powered USB hub. The Pi is a bit power hungry requiring up to 700 mA to operate. Many use a small cell phone charger to operate it and a lot of them are only 1 amp, which doesn't leave a lot of excess power to run the other components. If the Pi doesn't get adequate power there can be some intermittent operating problems. The answer that Noel provided below is using an external 4-port hub, which I assume has its own power supply. Spend a few $ and get a powered hub!
608825
You need to plug both USB ends. This way, your external HDD will draw more power than from a single USB 2.0 port.
1091307
No external power required. Only needs a USB port with enough power. Most standard USB 3 ports should be adequate.
399750
No. This is totally portable. No external power needed. It will not charge devices it is just a hub which is exactly what I wanted. It works terrific.
539336
Yes Fedora23 use this adapter New Premium External Power Supply 5.0v 2.0A (2000mA) AC/DC Adapter for USB HUB. hope this help it is what I use and I have a red 7 port hub as well
528563
That other answer is not entirely correct. A powered hub can operate on USB power only. It does not NEED to be plugged into AC. It will work the same as an un-powered hub, which will limit you to a total of 500mA of current draw from all ports combined. However, if you use the AC adapter then you will have up to 500mA per-port (2A total).So if you are only going to connect low powered devices, or self powered devices, then the AC adapter can be considered optional. If you need to connect devices that draw more power (portable hard drives, USB powered scanners, burners, etc.) then you would need to use the AC adapter to supply the additional power. That other answer is not entirely correct. A powered hub can operate on USB power only. It does not NEED to be plugged into AC. It will work the same as an un-powered hub, which will limit you to a total of 500mA of current draw from all ports combined. However, if you use the AC adapter then you will have up to 500mA per-port (2A total).So if you are only going to connect low powered devices, or self powered devices, then the AC adapter can be considered optional. If you need to connect devices that draw more power (portable hard drives, USB powered scanners, burners, etc.)... » Read More That other answer is not entirely correct. A powered hub can operate on USB power only. It does not NEED to be plugged into AC. It will work the same as an un-powered hub, which will limit you to a total of 500mA of current draw from all ports combined. However, if you use the AC adapter then you will have up to 500mA per-port (2A total).So if you are only going to connect low powered devices, or self powered devices, then the AC adapter can be considered optional. If you need to connect devices that draw more power (portable hard drives, USB powered scanners, burners, etc.) then you would need to use the AC adapter to supply the additional power. « Show Less
2038167
No. This device does not need external power. Direct plug and play ( like a thumb drive)
443939
I have not attempted to use the hub w/o the power adapter, as I have nine USB components connected to it, including a webcam, two printers, two scanners, turntable, VCR, DVD drive, etc.
2095580
Very little. Don't plug a HD or scanner into it, or anything that draws a significant amount of power. Trying to drw much power out of one of the USB 2 ports can drag down the entire hub for that port. Plug things into it that you would plug into an unpowered hub.
1519019
Depending on the drive.. Some smaller (2.5", 1.8", etc) drives enclosures require no additional power and if they are capable of using a single (or sometimes dual) USB ports for operation, you will have no trouble using them with this hub. However, larger drives (3.5") enclosures must be plugged in to external power source (they usually come with power adapters). For those you will not be able to operate them with this hub only, without external power source.
1827475
It needs 2 powered USB ports to operated correctly. You would need would need 2 hubs