P4C800-E Deluxe Power Requirements
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From: Paul on 14 Apr 2008 12:38 Peter wrote: > > Paul - > > Thanks for your reply. My USB ports still work and still provide power to > my external USB hard drives (at least they do most of the time). The > problem is difficult to describe. The drives have become flakey since the > removal of the -5v power supply. When I am copying files to one of the > external drives the first ten or so files copy normally but then the > copying just stops. The drive no longer writes data. Also, I > occasionally hear an audible beep coming from the drive which I think > means a power problem. > > Prior to removing the -5v power supply from the PC the external drives > worked perfectly all the time. The flakey behavior coincides exactly with > the removal of the -5v power. When I move the external drives to a > different PC they still work perfectly - so it's not a drive problem. > > This problem happens regardless of which USB port I use on the PC. > > Peter Would it be possible to install a powered USB hub (has its own AC adapter), between the P4C800-E motherboard and the external drives ? An alternative solution, is to install a PCI USB2 card and see if the symptoms remain. You can continue to plug your keyboard into the motherboard USB, but could connect external enclosures to the PCI card USB ports. http://www.newegg.com/Product/ProductReview.aspx?Item=N82E16815104216 Paul
From: Peter on 14 Apr 2008 14:04 On Mon, 14 Apr 2008 12:38:05 -0400, Paul <nospam(a)needed.com> wrote: >Peter wrote: > >> >> Paul - >> >> Thanks for your reply. My USB ports still work and still provide power to >> my external USB hard drives (at least they do most of the time). The >> problem is difficult to describe. The drives have become flakey since the >> removal of the -5v power supply. When I am copying files to one of the >> external drives the first ten or so files copy normally but then the >> copying just stops. The drive no longer writes data. Also, I >> occasionally hear an audible beep coming from the drive which I think >> means a power problem. >> >> Prior to removing the -5v power supply from the PC the external drives >> worked perfectly all the time. The flakey behavior coincides exactly with >> the removal of the -5v power. When I move the external drives to a >> different PC they still work perfectly - so it's not a drive problem. >> >> This problem happens regardless of which USB port I use on the PC. >> >> Peter > >Would it be possible to install a powered USB hub (has its own AC adapter), >between the P4C800-E motherboard and the external drives ? > >An alternative solution, is to install a PCI USB2 card and see if the >symptoms remain. You can continue to plug your keyboard into the >motherboard USB, but could connect external enclosures to the PCI >card USB ports. > >http://www.newegg.com/Product/ProductReview.aspx?Item=N82E16815104216 > > Paul Paul - I certainly could get a powered USB hub or a PCI USB2 card but I'd rather try to figure out what changed in the PC to cause this problem. This PC with the external USB drives worked fine for a few years. Now there's a problem with the external drives and it started at the exact time the -5v power supply went away. If getting another power supply that has -5v will fix this problem I'll do it. If that's not the cause then I'd like to know what is. (I have no other suspects than the power supply.) Peter -- **Remove Xs to reply by e-mail**
From: Eric Parker on 15 Apr 2008 04:47 "Peter" <XXpmpmpmXX(a)mindspring.com> wrote in message news:gr6704lgf9p5nvqc316ilji146gq0drl63(a)4ax.com... > On Mon, 14 Apr 2008 12:38:05 -0400, Paul <nospam(a)needed.com> wrote: > >>Peter wrote: >> >>> >>> Paul - >>> >>> Thanks for your reply. My USB ports still work and still provide >>> power to >>> my external USB hard drives (at least they do most of the time). >>> The >>> problem is difficult to describe. The drives have become flakey >>> since the >>> removal of the -5v power supply. When I am copying files to one of >>> the >>> external drives the first ten or so files copy normally but then the >>> copying just stops. The drive no longer writes data. Also, I >>> occasionally hear an audible beep coming from the drive which I >>> think >>> means a power problem. >>> >>> Prior to removing the -5v power supply from the PC the external >>> drives >>> worked perfectly all the time. The flakey behavior coincides >>> exactly with >>> the removal of the -5v power. When I move the external drives to a >>> different PC they still work perfectly - so it's not a drive >>> problem. >>> >>> This problem happens regardless of which USB port I use on the PC. >>> >>> Peter >> >>Would it be possible to install a powered USB hub (has its own AC >>adapter), >>between the P4C800-E motherboard and the external drives ? >> >>An alternative solution, is to install a PCI USB2 card and see if the >>symptoms remain. You can continue to plug your keyboard into the >>motherboard USB, but could connect external enclosures to the PCI >>card USB ports. >> >>http://www.newegg.com/Product/ProductReview.aspx?Item=N82E16815104216 >> >> Paul > > Paul - > > I certainly could get a powered USB hub or a PCI USB2 card but I'd > rather > try to figure out what changed in the PC to cause this problem. This > PC > with the external USB drives worked fine for a few years. Now there's > a > problem with the external drives and it started at the exact time > the -5v > power supply went away. If getting another power supply that has -5v > will > fix this problem I'll do it. If that's not the cause then I'd like to > know what is. (I have no other suspects than the power supply.) > > Peter Peter Given your description of the events, it suggests to me that your PSU dying may have damaged your MB, more specifically the USB controllers. Eric -- Remove the dross to contact me directly
From: Bob Willard on 15 Apr 2008 06:46 Peter wrote: > I think the P4C-800E Deluxe board might need -5v because: > > 1. The manual that came with the board says it does - although it doesn't > say what it needs it for. > I don't believe it needs any -5v. The MB monitors what it needs, and it does not monitor -5v. > 2. The board has a -5v connector on it. > That's because it uses the standard ATX power connecter -- a standard that was created long ago, when some MBs did use -5v. > The original power supply I had in this PC supplied -5v and everything > worked fine. That power supplied died recently and I replaced it with a > new one that does not have -5v. The board itself still *seems* to work OK > (no obvious problems) but two external USB drives connected to this PC no > longer work properly. They still work but not 100% properly and that > started happening exactly when the -5v disappeared. > I suspect that is a coincidence. I see no sign that my P4C800ED MB needs -5v for anything. -- Cheers, Bob
From: Bob Willard on 15 Apr 2008 06:58
Peter wrote: > > I certainly could get a powered USB hub or a PCI USB2 card but I'd rather > try to figure out what changed in the PC to cause this problem. This PC > with the external USB drives worked fine for a few years. Now there's a > problem with the external drives and it started at the exact time the -5v > power supply went away. If getting another power supply that has -5v will > fix this problem I'll do it. If that's not the cause then I'd like to > know what is. (I have no other suspects than the power supply.) > > Peter Uh, the USB ports are driven from the ICH chip, which does not use -5V. -- Cheers, Bob |