Xeon Phi Power Consumption

[Konstantinos_I_1]

Hello,
I'm experimenting with the power states of 57-core Intel Xeon Phi (model 3120A). Although all the available power options (pc6, pc3,corec6, cpufreq) are enabled, when I'm using micsmc to monitor Xeon Phi power with no processes running, I see that total power is about 100W. However I've read in some documents, (like page 53 of this http://www.intel.com/content/dam/www/public/us/en/documents/datasheets/xeon-phi-coprocessor-datasheet.pdf or page 57 of this http://www.colfax-intl.com/nd/downloads/Xeon-Phi-Coprocessor-Datasheet.pdf) that when coprocessor is idle it should have less than 30W power.
Do you know any possible reasons about that? Is there any problem with the power measuring unit or with the specific Phi Model that I'm using?
Thank you for your time and assistance.

[JJK]

please be aware that the 'micsmc -f' data cannot be used as a reliable measurement of power usage.

On my 5110P's I see a typical power usage of 85 W during idle, sometimes dropping to 35 W when the card is really doing nothing (again, using 'micsmc -f'). Your card has active cooling (hence the 'A') which could increase powerusage by quite a bit.

[McCalpinJohn]

There are two ways to determine power usage on a Xeon Phi that won't interfere with low-power idle operation:

1. Use an instrumented PCI riser card and instrumented auxiliary power connectors.
2. Use the "out-of-band" management facilities described in Section 6.6 of the Xeon Phi datasheet (referenced above).

I don't have (1) and our systems don't support (2), so I have not tried either of these, but (1) has certainly been used in the literature and (2) is reported to be supported on at least some newer host systems.  (I don't need to worry about perturbing the low-power states on our systems, since they are pre-production SE10P models that have most of the power-saving features turned off anyway.)