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UnfriendlyFire
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How do I set USB ports to power off when I turn off the PC?

Wed Oct 09, 2019 4:56 am

I am using 6x 80mm USB powered fans along with PWM case fans, and those USB fans will still run even after shutting down the computer.

I have looked through BIOS options in my ASRock B450m Pro4 mobo to set the mobo to turn off USB power when the computer is turned off, but can't seem to find it. I would strongly prefer not having to rely on turning on/off the PSU power or constantly unplugging the USB cables from the rear I/O panel.

Why do I have half a dozen of USB powered fans? I scrapped them from laptop coolers that were going to the trash.
 
Captain Ned
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Re: How do I set USB ports to power off when I turn off the PC?

Wed Oct 09, 2019 5:39 am

Disable wake on USB and that should shut down the standby power.
What we have today is way too much pluribus and not enough unum.
 
just brew it!
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Re: How do I set USB ports to power off when I turn off the PC?

Wed Oct 09, 2019 6:19 am

Another possibility (in case your BIOS doesn't have an option to disable wake on USB): Get one of these, plug a cheap port powered USB hub into it, and plug the fans into that.
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meerkt
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Re: How do I set USB ports to power off when I turn off the PC?

Wed Oct 09, 2019 8:13 am

UnfriendlyFire wrote:
I would strongly prefer not having to rely on turning on/off the PSU power

Why?
 
Captain Ned
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Re: How do I set USB ports to power off when I turn off the PC?

Wed Oct 09, 2019 8:36 am

meerkt wrote:
UnfriendlyFire wrote:
I would strongly prefer not having to rely on turning on/off the PSU power
Why?

Well, in my case (heh), that would involve reaching behind a mass of cables all the way to the floor to reach the switch.
What we have today is way too much pluribus and not enough unum.
 
meerkt
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Re: How do I set USB ports to power off when I turn off the PC?

Wed Oct 09, 2019 8:49 am

I use power strips with a switch. One fell swoop, and also the monitor is really off.

Hmm... the old PSUs with an IEC output were actually a decent idea.
 
Usacomp2k3
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Re: How do I set USB ports to power off when I turn off the PC?

Wed Oct 09, 2019 10:44 am

meerkt wrote:
I use power strips with a switch. One fell swoop, and also the monitor is really off.

Hmm... the old PSUs with an IEC output were actually a decent idea.

I had completely forgotten about those. Did the ATX standard kill them off? I think it was only AT boards that had the side-by-side power connectors (that I put in backwards once. Oops), the physical power button, and the power out.
 
UnfriendlyFire
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Re: How do I set USB ports to power off when I turn off the PC?

Thu Oct 10, 2019 3:22 am

Usacomp2k3 wrote:
meerkt wrote:
I use power strips with a switch. One fell swoop, and also the monitor is really off.

Hmm... the old PSUs with an IEC output were actually a decent idea.

I had completely forgotten about those. Did the ATX standard kill them off? I think it was only AT boards that had the side-by-side power connectors (that I put in backwards once. Oops), the physical power button, and the power out.


I recall seeing a JohnnyGuru PSU review from around 2010 where the author noted the power outlet on the PSU to connect a monitor and the completely outdated internal designs (along with the PCB's silkscreen indicating that there should have been more and larger components soldered onto the PCB, aka the manufacturer had cost-down the components after the initial design).

I'll be starting up the computer again after I finish rerouting some of the cables to dig through the BIOS again. I also had to clear the CMOS (take out the battery and press the power button for 20 seconds) after I used RAM timing settings that caused it ti unable to POST. Whoops.

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