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Windows 7: Why do USB hub's have only 4 ports

12 May 2012   #1
kbrady

windows 7
 
 
Why do USB hub's have only 4 ports

I have five USB 2.0 hub successfully operating over 20 devices. As these fail I will upgrade to 3.0. Anticipating more 3.0 devices and a 3.0 motherboard in the future. Why do they only have four ports? If I am mixing 2.0 hub with 3.0 hub's should I plug in. In a certain order



My System SpecsSystem Spec
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12 May 2012   #2
zigzag3143

Win 8 Release candidate 8400
 
 

I believe partially because of design (where would you put any more) on laptops, and because USB runs on +5v. More than 3-4 unpowered devices decrease the voltage. If you have many un-powered devices the mfr's either have to build a more robust system (which we would pay for) or limit the number of ports.

Those who have more have to buy a powered USB hub which fixes both issues, those who dont have many would not have to pay $$ for it.
My System SpecsSystem Spec
12 May 2012   #3
seavixen32

Windows 7 Ultimate SP1 64-Bit
 
 

You are restricted to 4 ports because of power considerations, as explained in this article.

USB hub - Wikipedia, the free encyclopedia

Otherwise, buy a powered hub.
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 Why do USB hub's have only 4 ports




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