Does anyone know why there is 2 USB's on the cable?
1557995
Compared to the previous versions of this Alfa product, this one has a higher TX wattage rating. Thus it needs additional power to be supplied to it, to be able to transmit at that higher wattage. Hence the need of the second USB connector. The USB port on your computer supplies +5V to the Alpha, but it limited by the USB Specification to some amperage. Devices that need more then the spec, usually plug into two USB ports. Although Alfa likely won't document that you can really run the unit only one USB port, I've found you can, you generally don't need all that additional TX power unless you got a really weak connection to the Wifi port you are connecting to. Hope that answers your question, I try to keep it as none technical as possible. If you look a the cable, one is the main USB connection it supports Data and Power, the other one that looks like it's a offshoot, is typically just power.
1557996
I am not positive, but from what I have read it is so that you can draw twice as much power to supply the unit. most computer ports supply have a watt of power by using 2 you can suppy 1 watt. The unit is rated at 2 watts to supply that you will most likely have to run one usb port to your computer and the other to a powered USB hub that has a higher power rating. I have not noticed much difference with 500mv or a full 2000mv of power.
1557997
yes there is 2 usbs in the cable. i personally dont like this device it is a battery drainer to a laptop
2211420
You need to plug both in because one transfers data and the other supplies power. If you can only connect one then you need a usb splitter.
378130
They don't have to be.The two black connectors are power and data, the white connector is power only.The purpose of this cable is to power a device that exceeds the limit for a single USB 2 port.Note that USB 3 ports have more power and shouldn't need a Y cable.It is possible to plug the white plug into a separate USB power adapter.This is chancy because it is possible for the power to feed back into the device the black plug is attached to and damage it.For some devices this is the only way to solve a power issue.
909017
No. The extra USB connection is to provide more power to one device than a single connection allows. Some hard drives need more power and that's what this cable is for.
219437
There is just the 2 usb ports in the front and 2 in the back. They are not 2.0
1399316
My Gigabyte card only has one USB header on the board. My only thought for why there might be a second USB header is that this board may have multiple models (perhaps one that comes with additional USB ports) and for cost-savings they re-use components. That's just a wild guess. Again, my card does not have a second USB header - just the one for enabling bluetooth connectivity.
484136
You see in the pic how it has 2 cables shown. Well when mine was sent it only came with one and it's not working at all. Since it took about a month to get the cable I didn't want to wait another month to be able to use it. So it didn't work out for me.
602461
I'm donating it so it's packed away right now. I seem to recall a cable that had a standard A connector on it. Whatever it was, it didn't meet my needs, and I bought a 2 port front panel USB 3 unit.
329392
there are 4 usb ports 2 on the left and 2 on the right. the 2 on the right are usb 3.0
1416002
It has the second USB connector if additional power is needed but I am running it using just the main USB connector plugged in....No issues to speak of.
1163501
Did you use one or both connectors? Also try different USB ports. Please do NOT go look for drivers on the internet
3977
Yes, one is for data and the other is for power. Sometimes a USB port won't supply enough power through one port. I have used an adapter that just had one USB. This one does require the use of both.
676023
The previous answer is correct "The are two cables. One is for fast charging and the other is primarily for data transfer but I think it can be used for charging as well. Both cables are approximately three feet long"
907289
In between the 2 USB ports there is a small hole where a cable is plugged in for power. The other end is plugged in a USB port.
1024878
There are 2 USB 3.0 ports & 4 USB 2.0 ports at rear; while at front there are 2 USB 2.0 ports on my model
876740
The cable that comes is a single cable that plugs into the drive, but it has two USB cables on the other end. So, it branches from one cable into two USB plugs. You can probably use just one of those plugs for reading (depending on how much power your computer's USB ports have), but you may need to plug in both for writing since that takes more power.
620626
I just got this laptop a few months ago, its got two USB 3 ports on the right side and one USB 2 port on the left.