How much power does each USB 3.0 port supply without and with the AC adapter cable connected?
1515348
The ExpressCard interface is a relatively low-power interface, +1.5V and +3.3V DC with a combined draw of 1,000mA, if I am reading the specification correctly. The AKE USB 5Gbps USB 3.0 ExpressCard, model # BC618T, card may not even support that. This means anything power power-hungry than a USB flash drive is likely going to need an external power source, including otherwise bus-powered USB 3.0 hard disk drives. The AKE card comes with micro-plug to a USB 2.0 power adapter cable to provide it with an additional ~500mA of current. Power supplied depends on the computer manufacturer. I've have a the Dell schematics for my laptop and it appears that they don't limit the current available to individual ports. Maximum power is going to depend on all the loads on supply so it going to depend on all you have plugged in.
320810
An adapter is not supplied. I have no problem with the 3.0 USB connection. External power adapter port is available. Very happy with this drive.
2116067
The USB port outputs 5V DC, the Amps it can provide is 1A making the Wattage 5.
302414
A USB port uses a max 500ma of +5vdc power = 2.5 watts. Thanks for using AnswerParty!
2095582
The standard is 500mA for USB 2.0 and 900mA for USB 3.0. Do the math, and you'll see that the power supply doesn't cut it for 24 USB 2.0 and 4 USB 3.0 ports. 24 x 500mA = 12A 4 x 900mA = 3.6A The power supply would need to be 15.6A at 5V. Since the power supply is only 4A at 5V, you're only going to be able to power four USB 3.0 devices (900mA x 4 = 3.6A) OR eight USB 2.0 devices (500mA x 8 = 4A). Perhaps Manhattan should do what Anker does and use a 12V adapter and whatever they do to undervolt/cut down their USB 3.0 9-port hub to 5V per port (that thing comes with a 12V, 5A power adapter! The brick is almost as big as most laptop power bricks!) Using the formula of Volts x Amps = Watts (5V x 15.6A = 78W), we can conclude that at 12V, only 6.5A would be needed (12V x 6.5A = 78W). It's a shame, though, as a 28-port USB hub is cool as all hell, but in practice, it doesn't work right unless you're using all self-powered devices (devices that have their own power adapters).
1364308
Well they say 440 watt however I myself have been using it on a system with 230 watts power supply with no issues. Just note I am not using any extra internal or external devices beyond what the computer came with other than this card...so no external USB's etc...hope that helps
1112803
pc usb ports typically put out 0.5amps. these power packs can do 1A and 2A, it probably can.
1934516
No, all USB ports on computers are essentially the same except for the power output. USB 2.0 ports output .5 Amps (500mA) while USB 3.0 ports output .9 Amps (900mA). USB ports that are on AC adapters and phone chargers are capable of outputting much more power.
1210100
The cable power goes from USB 5v out to the adapters. It may be rated for 12v however, USB is only rated at 5v.
872299
Power supply output: 5V 2500mANot sure how much power of the ~500mA from the PC USB port the hub is plugged into is used by the hub itself.Not sure about power supplies with versions other than the 13-port USB 2.0 hub.
613509
This hub does not include its own power supply so the *total* current it can supply among all four of its ports is the maximum the port it is plugged into can supply. For USB 3 ports on desktop computers, that is usually 900 ma (0.9 amps); for some laptops it may be only 150 ma (0.15 amps). So no, it will not supply anything even close to four amps on any of its ports, nor will it supply more than 0.9 amps on any one port when plugged into a normal USB 3 host port on a computer even if the other three of its ports are unused.
1057436
According to the Data Sheet, the energy consumed when USBs are not in use per hour: No Load Current .0013A No load Watts .63W
1129224
you just plug the USB 3.0 into your USB port. Then you plug a network cable into the adapter.they mean there's no power adapter needed besides the power supplied from the USB port.
130276
Depends on the USB adapter. It rated to work with USB 2.0 power standards. 5V 500mA or .500A. I don't feel, see or hear any difference from using a 2.0 hub or a 3.0 hub. Sorry I don't have a usb power meter to confirm its actual power draw. In short if the adapter is rated for at least 500mA then yes. Its not dead silent. You will hear and feel the wind from it. Depending on the position of the fan you might hear some motor or mechanical noise.
650934
I haven't used anything power-hungry on 3.0 so I can't comment. Mouse, headset and charging other devices at the same time works just fine though.
1930222
I know they require a lot of power, I can't tell you the exact amount. I would definitely buy a powered USB hub.
377804
I use a powered usb hub. So I can plug many things into the hub and it has it's own power pack. Then I don't overload the onboard power from the pc.