Does anyone has problems with external hard drives powered by usb bus connected to this mobo?

I have a wireless G7 mouse receiver/charger and G15 keyboard connected to the usb ports at the mobo, when I try to connect any external hard drive, if it's a single usb cable then Windows will show unknown usb device error, and if I connect with a Y-type usb cable then it will recognize the hard drive but my keyboard will be unusable..the backlight on the G15 seems to fluctuate/blinking non stop and lost signal.

However, I've tried to connect the hard drive to the casing front panel usb ports with the Y cable and there's no problem.

I'm suspecting the motherboard does not provide enough power to all the usb ports at the mobo.

Previously I was using abit IP35pro and I had connected these usb devices simultaneously without a hitch

EDIT : Apparently after I tried adding a USB pci bracket from my previous mobo, the power seems to be stable now as i connected my KB and mouse receiver to the usb bracket and external HDD to the mobo usb port.

This post has been edited by SkyX: Sep 9 2008, 10:23 PM

Not sure if it's PSU problem as I'm using FSP epsilon 700w and have no problem connecting all those devices together to my previous IP35pro....should I exchange the board for a new one?