how to determine PSU wattage

[Oleg Goldshmidt]

Hi,

Is there a way to determine the nominal PSU power without taking the
computer apart (actually, preferably without powering it down)? Is there
any vendor information that Linux could in principle read? It's a
vanilla home desktop, not a brand name server.

I know of dmidecode and lshw, but neither returned anything for
PSU. There is nothing on the outside of the PSU that I can find (well,
it does say "220Vac").

Can acpid help? Am I out of luck?

Thanks,

-- 
Oleg Goldshmidt | pub at goldshmidt.org