Yes wrote:
I'm thinking about buying a USB 3.0 external hub for my pc. I'm
looking for one that has about an 18 to 20 inch cable length and will
use the older 3.0 USB connectors (Type A ???). Are there any hubs
being made that fit those conditions? Who is making them?
Get a hub that has no atached cable. Then attach a USB 3.0 cable of the
length you desire at a maximum of 3 meters for a passive USB3 cable; see
http://www.yourcablestore.com/USB-Ca...m_ep_42-1.html
If you will be attaching more than one high-powered USB 3.0 device to
the hub, make sure to get a hub that is externally powered and whose
walwart is rated for N x 900 mA, where N is the number of ports on the
USB hub, so each USB 3 device can have full power from the hub. If the
hub has 4 ports, you want the walwart rated at 3.6 amps, or higher, for
its *output* load (to the USB hub). If one of the ports is a high-amp
charging port, you'll have to add its amperage (2.4 A) into what the
walwart must support for the total load of all ports in use on the hub.
I've seen 4-port USB 3 hubs externally powered with a 2.4A charging port
but the walwart was rated only for 2A which isn't even enough for the
2.4A charging port.
Without external power to the hub, the hub will only get the 0.9A load
across ALL its ports from the USB 3 port into which you plug the hub.
That is, all USB devices (2.0 or 3.0) will have to share the single 0.9A
maximum load from the one USB port on the computer.
The ones I saw at newegg look to have cords about 6 inches long. That
is not long enough given where my pc is located. FWIW, my mobo does
not have the onboard UsB 3.0 connector to enable using USB hubs that
fit into 3.5" and 5.5 bays.
To what would you be connecting the USB 3.0 hub if your computer doesn't
have any USB 3.0 ports? Mobos I've seen that had USB 3.0 support had a
USB 3.0 header for support of front-panel USB ports. Perhaps you have a
mobo that is devoid of USB 3.0 support (it only supports USB 2.0) and
you installed a daughtercard to add USB 3.0 support. That daughtercard
doesn't have a USB3 header or an internal USB3 port?