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Forum Discussion
Nighthawk CM1100 power consumption?
Would anyone know Nighthawk CM1100 DOCSIS 3.1 Cable Modem average / peak power consumption? (Finding it neither on the product page nor in the docs. Thanks!
> [...] Finding it neither on the product page nor in the docs.
For what, exactly, were you looking? I'd check the ratings on the
labels for the device and its power adapter, or in its User Manual,
under "Technical Specifications", where I see:
[...] Output: 12 VDC, 2.5 A
12V * 2.5A = 30W
That'd be maximum. For a realistic value, you might need to measure
it:
antinode wrote:For what, exactly, were you looking?
You mean the reason? So I could size it up with a battery (UPS), to estimate runtimes.
P.S. Agreed, PSU rating is not a realistic value and thus shouldn't be used.
P.P.S. Don't have it, so can't measure - which is why I am asking.
> You mean the reason? [...]
No. You said that you were "Finding it neither on the product page
nor in the docs." I found _a_ power value, so I wanted to know, "For
what, exactly, were you looking?" Hence that question.> [...] So I could size it up with a battery (UPS), to estimate
> runtimes.Even the max of 30W would not be much for a typical computer-sized
UPS. How much stuff were you planning to run on the UPS, for how long?
How precisely did you expect to gauge this stuff?> P.S. Agreed, PSU rating is not a realistic value and thus shouldn't be
> used.I'd say that it's very "realistic" as an upper bound, and suitable
for that use.
> P.P.S. Don't have it, so can't measure - which is why I am asking.Is this "it" the power meter? On the DC side, even a small ammeter
ought to be good enough.Be careful with your assumptions. A typical UPS is rated for use
near its maximum output, and its efficiency may drop significantly under
a light load.I am guessing nobody has the answer to the question of actual power consumption. That's too bad. (But some of us are eager to engage in a Friday afternoon ego measuring contest. Mind if I bow out?)
> I am guessing nobody has the answer [...]
I can't speak for everyone; I don't have a unit to measure. My
attempts so far to gather more useful information about the situation
have failed.> [...] Mind if I bow out?
Your actions are your business. I hope that your power analysis is
better than your psychological analysis.