Re: Power supplies and reliability

David Christensen wrote: 
> On 6/2/26 07:02, Stefan Monnier wrote:
> > > I've seen too many hard-to-diagnose problems that disappeared after
> > > replacing a sketchy PSU.  Random hangs and crashes, hard drive errors, video
> > > noise, hang on reboot, etc.  I no longer try to go cheap when choosing a PSU
> > > for builds.
> > 
> > Yeah, I'm actually surprised the hardware hasn't caught on accordingly:
> > while it's now standard for chips to monitor their temperature (and
> > adjust their power consumption if it gets too high), I still haven't
> > seen anything comparable that would detect and report when the input
> > voltage goes out-of-range (and maybe also take steps to reduce the
> > instantaneous power consumption?).
> > 
> https://en.wikipedia.org/wiki/Lm_sensors
> 
> lm_sensors (Linux-monitoring sensors) is a free open-source software-tool
> for Linux that provides tools and drivers for monitoring temperatures,
> voltage, humidity, and fans. It can also detect chassis intrusions.

Almost all of those sensors are on the motherboard or on
attached cards; you'll frequently get to see voltages from the
CPU, but hardly ever does a power supply tell you about its
load.

If you plug in a UPS, most (but not all) can give you
information about the wall outlet power and how much is
currently being drawn by the machines attached to the UPS.

-dsr-