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USB 2.0 Install Problem

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06-M A F I A –[PCI USB2 Expansion Card Issue]
14th June 2006

i have been a bit busy lately so i could not reply over the past few days.

That’s OK – It was a fair size task – I gave you + others that are following –

i get the same info in device manager when i switch to a different port and i get 200mA of power when i connect flash disk. i also tried plugging in my ipod into the ports and i get 500mA of power. i think the ipod uses more power as it also charges the battery.

Ok – that is correct – However these 2 devices are considered – High Power Devices – since they draw more than 100 milliamps – So basically – this is the reason why certain USB Ports – [Usually the Front Ports] – do not always work – They usually work only with Low Power Devices –

You are correct with the info on the – iPod – Now 500 milliamps is the Maximum USB Power consumption level - Now again this device may only function in the two rear USB Ports – that are – Directly Soldered Connected to the Motherboard – And it is recommended – that the iPod be connected to the USB Port via of – USB 2.0 Self Powered Expansion HUB – that is connected to a USB 2.0 Port – This way the Device will only draw 2milliamps from the PC USB Power Bus – and the 500 milliamps from the Self Powered HUB Power Adapter – which will take the strain off the PC Power Supply -

This gets us back to my original observation/analysis of the problem – perhaps since this is an upgrade from WIN ME –

My pc is around 5/6 years old
i have tried installing the card by taking it out and putting it back in and still no luck. i have also tried putting it in other pci slots that i have and still the same problem.

It is not an upgrade from win 9x. it was an upgrade from WinMe.


I believe that your Power Supply is marginal for your System – and is not able to supply adequate Power to the PCI Bus – for your Ali USB 2.0 Card – and when you insert a USB 2.0 device – It appears to be installed as a USB 2.0 USB Host Controller – but is not able to perform as a USB 2.0 Device – because of the – PCI Power Bus Deficiency – [??]

It is – My opinion – that you need to run your USB 2.0 Devices – thru a USB 2.0 Self Powered HUB – connected to the ALi USB 2.0 Ports – to isolate the USB Device Power – from the PCI Power Bus - It is not bad enough to cause a – Power Reset – but the it cannot effectively handle the Inrush Current & Voltage drops –

Belkin F5U224 HUB- http://www.usb-2-0.c...kin-f5u224.html


Edited by Jack123, 13 June 2006 - 10:23 PM.

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M a f i a

M a f i a


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ill buy the self powered hub tommorow and see what happens. ill post back results
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