[mythtv-users] Architecture Idea - Raspberry Pi, VM, XBMC

[Michael Watson]

On 6/01/2013 5:28 AM, Raymond Wagner wrote:
> On 1/5/2013 12:03, Roger Heflin wrote:
>> On Sat, Jan 5, 2013 at 10:22 AM, Raymond Wagner 
>> <raymond at wagnerrp.com> wrote:
>>> On 1/5/2013 09:37, Roger Heflin wrote:
>>>>
>>>> The baseline Atom board with a good power supply runs
>>>> about 30-40W at idle
>>>
>>>
>>> Thats awful! My 3.1GHz Ivy Bridge with a middling power supply only 
>>> runs
>>> about 25W idle.
>>
>>
>> It is a 3 year old machine measured at the outlet plug.
>>
>> What kind of meter are you using to measure that?
>>
>> My ivy bridge laptop runs 17W at idle with the screen off, and that 
>> is with
>> a low power laptop cpu vs a high power desktop cpu and for the most 
>> part most
>> of the desktop motherboards don't do that well on power savings at the
>> mb level, where the laptop chips are setup for power savings.
>
> This is a 55W rated G2120 (Pentium, not i3) on a Foxconn H67 board, 
> and whatever not-80Plus rated 150W PSU Antec puts in their ISK300. 
> Idle is 25W measured at the wall with a Kill-A-Watt, and oddly enough 
> it runs that same value whether running full speed at 3.1GHz or 
> downclocked to 1.6GHz. Perhaps the CPU was doing that on its own 
> automatically when I didn't have the kernel modules loaded to allow 
> Linux control. ATSC playback with software decoding and OpenGL is 32W, 
> and full load on both cores is 45W.
Or your Kill-A-Watt meter is not really that accurate.

The sampling rate is very low compared to meters like the fluke, so it 
can miss quick spikes or surges in usage . When I used it to measure the 
power usage of a 51" hdtv at turn on, it constantly gave different 
readings. Range from 410 watts to 504 watts. Fluke 448 to 453 watts.

PC, using a 750watt Ultra lsp model.
Core2, running at 3.3ghz, 7900gtx , pc running gelato (nvidia software 
that uses the gpu as a fpu, while also using the host cpu), maxes both.
Killawatt 316watts, fluke 329watts.