Hi all is there a limit to the number of usb ports i can use i have a 7 port hub i plug ged another 7 port hub?

Question

into the first one but my computor wont recognise it anyone help please thank you

Answer 1

According to the USB specification, the theoretical limit is 127 devices (actually 128, but the "root" USB port on your computer counts as 1). Each hub in the tree counts as a device, too.



In practice, you probably won't get anywhere near that before you run up against the limit for the amount of power that the USB port can supply to the devices.

Answer 2

hi there

in theory no... however its been well documented that 127 devices can be daisy chained but the problem here is usb devices still require power... no alot but when you have 127 of the blighters its going to put a strain on any system..

however a 7 port hub will experience no problems on even the most basic pc,s so it looks like your usb hubs problem is a fault with either one of the ports or all of them

have you tried it using another pc or a laptop.. this will then show you if the problems with the hub or your pc... and if so you will need to return the hub to the manufactuer

i allways use my rear(io sheild ) usb ports for any hubs... these tend to be more reliable than front based usb ports.... so try this before returning the hub

hope this helps,any problems let me know

good luck

Answer 3

If you are using a hub where the peripherals are powered from the computer

ie a web cam etc, then you can only use 4 because a USB had a limited power

supply. If you want more then use a mains powered hub.



They supply the power to the peripherals and not the USB.



Before the days of computers now coming out with at least 4 or 6 USB slots,

back in the bad old days computers only had 1 or even 2 if you were lucky!



I solved that problem by getting 2 x 4 USB powered hubs. In effect giving me

8 USB slots.

Answer 4

u need 2 get a hub with a separate power supply ( has a outlet plug to plug into the wall.) the port on the computer wont support that many ports on the 1 port on ur comp or try plugging the second hub into another usb port on the computer.

Answer 5

USB HUB charger Bitcoin USB ASIC Mining Razorfish Razorfish recommendations manufacturers USB HUB 19 Port USB Hub with imperative skill supply and steel/Aluminum case that's a 19 port hub With an imperative skill supply able to reliably providing extra that 500mA in step with port devoid of overheating or starting to be a fire risk. sixteen front dealing with well-known A USB ports 3 component dealing with well-known A a million grasp hub connection well-known B for connection to Computing kit or different hubs totally fused internally via skill of distinctive poly-fuse resettable fuses the two on each and each guy or woman port and on the main appropriate skill feed to the Ports. in contrast to could of the extra low-value USB ports that basically enforce hyperlinks at a million.0 12mb/s speeds (yet state they are 'properly suited' with USB 2.0) that's a expert finished 480 Mb/s port that complies and implements the completed 2.0 USB well-known, it may additionally be used to connect with common USB a million.0 kit. layout recommendations Hardware & application PCB layout and small Prototype runs Arduino Designs and Prototypes lights Controller Prototype layout Product Sourcing and assessment centers O.E.M centers Inspections

Answer 6

your computer wont recognize the second one.....thats its way of telling you "why in the heck would you need 7+ usb ports?"