|Each and every USB port directly connected to the GA-8IPE1000-G mboard and any PCI USB controller card in a slot on it can supply up to and inc. 500ma of current, but ports in a hub connected to only one USB port directly connected to the mboard or the PCI card often cannot, many devices do not work properly when plugged into such a hub, and in some cases you may have an IRQ sharing problem you need to fix - if you do have an IRQ sharing problem and you fix it, reloading the USB drivers is not enough - you must re-load the USB stack. . |
See response 3 in this:
External hard drives always require the max 500ma current be available from USB (or firewire) ports they plug into. Printers, scanners, multifunction printer/scanner/etc. devices often require more current than most other devices.
USB (and firewire, and PS/2 ports, and serial ports, etc.,etc.) requires accurate 5v power.
Your power supply must be working correctly.
Failing power supplies are common and can cause your symptoms.
Check your PS.
See response 4 in this:
If you don't see any obvious symptoms there's something wrong with PS, sometimes the only thing wrong is the chip that controls the PS inside the PS is out of whack and doesn't respond to changes in load on it properly. The only way you can find out whether your PS has that problem is to try connecting another known to be working fine PS to your computer.
If you have one or more PCI-E X16 video cards installed, you must make sure the PS has at least the minimum capacity required to handle a system with that or those video cards installed. A common mistake people are making these days is to not take that into account. If your PS capacity is 600 or 650 watts or more, that is enough to surpass the minimum requirement for any current high end PCI-E X16 video card, even one that is a X2 card (two video chipsets on one card) or even two cards with a single video chipset in two slots.
If your PS capacity is under 600 watts, you can find the minimum PS capacity, and, often, more important, the minimum current capacity at +12v your PS must have in the specs for the video card model, on the card manufacturer's web site - it's often listed under system requirements. If you don't find that, any card with exactly the same video chipset, including any letters, e.g. X1950 XT, or Pro, or XTX, has very similar minimum PS requirements.