Hojoboba Posted May 7, 2006 Posted May 7, 2006 I recentally installed an Expert and a new power supply into my case, most everything is great. The only problem so far is with what I suspect as an underpowered usb. I have an external 2.5 hard drive that can run via USB only on every other computer I've tried. When I plug my hard drive into any USB slot, the enclosure for the drive gives me a message telling me that the device is underpowered. Has anyone else experienced this with and Expert? Is there a fix for this besides spending money? Share this post Link to post Share on other sites More sharing options...
racinjimy Posted May 7, 2006 Posted May 7, 2006 get a $20 powered USB hub..............or use the drives external power source (if it has one) I have no experience with this problem as I do not have a USB drive that is not powered Share this post Link to post Share on other sites More sharing options...
Trebaruna Posted May 7, 2006 Posted May 7, 2006 get a $20 powered USB hub..............or use the drives external power source (if it has one) I have no experience with this problem as I do not have a USB drive that is not powered Yeah and if the ethernet doesn't work just buy a PCI card, and if the sound module doesn't work just get a sound card! Point is, it is just supposed to work. Getting a powered hub is not a fix, it's a workaround to a problem which shouldn't even exist. Anyway, I have a 2.5 inch hdd in a USB enclosure, and it runs fine off of the USB ports. In fact, I can put the drive in, use my modded nintendo DS charge cable, an IR blaster and my wireless dongle thingy at once without problems. I can think of no reason why it should be failing other than hardware failure at some point (logically this will be the PSU, the motherboard or the drive/enclosure itself). Wait, I can. Check if the USB is set to use the 5V standby-rail. If so, your PSU might not deliver enough current for it. EDIT: the manual will show a schematic of the motherboard with a jumper location and positions to switch between +5V rail and +5VSB rail. Note that there are 2 jumpers, one for the back USB ports, and one for the headerpins. Get the right one Share this post Link to post Share on other sites More sharing options...
Hojoboba Posted May 8, 2006 Posted May 8, 2006 Wait, I can. Check if the USB is set to use the 5V standby-rail. If so, your PSU might not deliver enough current for it. EDIT: the manual will show a schematic of the motherboard with a jumper location and positions to switch between +5V rail and +5VSB rail. Note that there are 2 jumpers, one for the back USB ports, and one for the headerpins. Get the right one I just finished looking at the jumpers, they're all set for 5v+ (non standby). I checked my psu's rails during operation, they're in working order (as far as voltage goes). And the enclosure works with every other computer I plug it into. : Well lol at me. I just noticed the extra power attachment on the board right above the large pci-e slot. I'mma try plugging something into that. :X Share this post Link to post Share on other sites More sharing options...
racinjimy Posted May 8, 2006 Posted May 8, 2006 Well lol at me. I just noticed the extra power attachment on the board right above the large pci-e slot. I'mma try plugging something into that. :X @Hojoboba: probably won't make a difference but let us know as I am curious @Trebaruna: take it easy there, you came across a bit harsh, but good point on the 5V or 5VSB jumper Share this post Link to post Share on other sites More sharing options...
Hojoboba Posted May 8, 2006 Posted May 8, 2006 After plugging in the extra power cable on the motherboard (above the pci-e slot) the rear usb inputs can now keep the external hard drive running. But the front usb inputs still cannot keep the hard drive running. : Share this post Link to post Share on other sites More sharing options...
Trebaruna Posted May 8, 2006 Posted May 8, 2006 Hmm... odd. While it should help with SLi, I don't think it does much else. Either way, even if it did it should work fine for *all* USB ports now. Maybe try relieving the PSU for a test. Take out the second video card and see if that improves the situation. Alternately, try exchanging PSUs if you have a spare one. In other words, methodically try to determine which bit is failing. @racinjimy: I didn't mean to be harsh per se, but I did find that initial suggestion a bit pointless. If I buy a high-end board I think I can expect the USB to be properly powered. Buying additional stuff to get it up to par shouldn't be necessary. Nothing personal though..! Share this post Link to post Share on other sites More sharing options...
slow'puter Posted May 8, 2006 Posted May 8, 2006 I'll repeat what has been said in this thread before; if the external drive comes with a power adapter and cord, use it. Is the drive being recognized by Windows? Share this post Link to post Share on other sites More sharing options...
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