📎 AI Summary:
The thread discusses the USB host controllers on a Windows PC, explaining that systems typically have multiple controllers (OCHI, UCHI, ECHI, and XCHI), with older ones like ECHI being slower. The original poster inquires about whether the slower transfer speeds are due to real hardware or drivers, and questions if a powered USB hub would improve performance, but it is clarified that hubs won't help because the bottleneck is the root controllers. The overall sentiment is informative, clarifying USB architecture and troubleshooting speed issues related to controller limitations.
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AhmedZeedy45

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Thread Author #1
An image from 'All USB Ports are on one Root Hub'. USB View software showing connected and unconnected USB devices on various Intel USB controllers.
 

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Neemobeer
Real hardware. The usb connections that use the older controllers will be much slower. A powered hub won't do any good because it will still have to go through the same root.
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Neemobeer

Neemobeer

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#2
Yeah all systems will have one or more USB host controllers. Each controller can host up to 127 usb devices. In order you have OCHI, UCHI, ECHI and XCHI host controllers (hardware controllers) You have two older (ECHI) controllers and one newer (XCHI) controller based on the image.
 

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AhmedZeedy45

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Thread Author #3
Neemobeer said:
Yeah all systems will have one or more USB host controllers. Each controller can host up to 127 usb devices. In order you have OCHI, UCHI, ECHI and XCHI host controllers (hardware controllers) You have two older (ECHI) controllers and one newer (XCHI) controller based on the image.
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driver or real hardware?
All Flash Disks work slower than when connected to my low end laptop

Would a powered USB hub be good?
 

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Neemobeer

Neemobeer

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#4
Real hardware. The usb connections that use the older controllers will be much slower. A powered hub won't do any good because it will still have to go through the same root.
 

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AhmedZeedy45

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Thread Author #5
Neemobeer said:
Real hardware. The usb connections that use the older controllers will be much slower. A powered hub won't do any good because it will still have to go through the same root.
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power is not enough for Bluetooth Adapter to run fine
 

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AhmedZeedy45

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Thread Author #6
Does my PC own 3 Root Hubs, and the first two are inside the case? Or two old drivers?
 

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