Subj : USB 3 Issue?
To   : Ky Moffet
From : Barry Martin
Date : Sat Dec 14 2019 09:59:00


Hi Ky!

Some additional information -- maybe you see something in the pattern:

 KM> You might want to get one of those little blue pass-through USB
 KM> testers that show voltage and draw, and check if there's a sudden
 KM> power drop, or worse, a spike. Also I would look at voltage on
 KM> the system power supply -- I have a tester that displays it for
 KM> each rail, but voltage reads might be in your BIOS under "PC
 KM> Health" or something like; maybe try hotplugging the offending
 KM> USB device and see if voltage jumps. If the 5v is out of whack,
 KM> that would affect some USB devices.
OK - have a USB voltage tester.  I think the BIOS does have voltage
readings but haven't paid too much attention so will check.

<new information  follows>
 
I have a bleck tester and a blue tester.  The black gives more 
information at a glance: V, A, some other stuff I don't recall right 
now; the blue one cycles between V and A.  

Plugged the Kingson 16 GB USB 3.0 into the black tester: 4.96 v, 0.10 A,
front left USB 3.0 port.

Little later plugged the blue tester in: freeze!  FWIW the black tester 
is on a short USB 2.0 extension cbale (about a foot long) because the 
display is usually facing the front direction.

REISUB did not work.

BIOS's readings:
       CPU     47øC
       MB      25øC
       
       CPU     1.296 v (FX-8320)
       3.3v    3.240v
       5v      4.992v
       12v     12.097v

Some time late inserted the Kingston thumbdrive into the port directly
(no meter) and <screech!>.  Same port as did the measurement earlier;
have inserted and removed this thumbdrive from the same port many times
before (and a couple times since).  <shrug>
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