[time-nuts] Modern motherboard with RS232 port
djl at montana.com
Sun Aug 19 15:38:09 EDT 2012
Phase angle/power factor
> Hi Ed;
> I may not have had enough coffee yet, but if Volt X Amps = Watts why
> would there be a difference?
> Best Wishes;
> Thomas Knox
>> Date: Sun, 19 Aug 2012 12:35:51 -0600
>> From: ed_palmer at sasktel.net
>> To: time-nuts at febo.com
>> Subject: Re: [time-nuts] Modern motherboard with RS232 port
>> It's important to remember that on a computer, the wattage shown has
>> relationship to the wattage pulled from the socket. The numbers shown
>> are maximum values. You have to measure the power draw and you have
>> measure it in volt-amps, not watts because that's how residential
>> is measured (at least in North America). Buy an energy meter that
>> volt-amps. They're relatively cheap - typically less than $50.
>> On 8/19/2012 11:06 AM, Chris Albertson wrote:
>> > This sounds like a newer version of the board I use. The thing to
>> > is if the CPU heat sink has a fan or not. Having no fan indicates
>> that the
>> > CPU is not using much power. It also removes a common failure
>> > To reduce power even more. On an NTP server you can unplug the
>> > mouse and monitor and if you have other servers on the LAN configure
>> one as
>> > a "boot server" and have it run TFTP then your NTP server does not
>> need a
>> > disk drive. It can run off a "RAM disk". This makes it very fast,
>> > faster than a SSD and it saves some cash. Makes backup easy too as
>> > is nothing to backup if there is no local storage. If you don't
>> have a
>> > TFTP server use a small notebook size disk drive. Even a 80GB drive
>> > overkill. You can also boot from a USB thumb drive and run a RAM
>> > It is worth it to look at your electric bill to find how much you
>> pay for
>> > power. Here I'm at $0.21 per KWH. A full size PC server can use
>> 250W or
>> > more. There are 8760 hours in a year so you get $460 per year to
>> run that
>> > 250W PC. The little Atom will pay for itself in just a few months.
>> > first time I did that calculation, my "power hogs" where given away.
>> > On Sun, Aug 19, 2012 at 7:42 AM, Stan, W1LE <stanw1le at verizon.net>
>> >> Hello The Net,
>> >> For your consideration:
>> >> The INTEL model DN2800mt ITX mother board uses a ATOM CPU and
>> >> draws about 11 watts of AC power when configured as:
>> >> (I have not measured DC power yet.)
>> >> 30 GB OCZ Nocti mSATA solid state drive,
>> >> WIN7 pro, 64 bit, USB keyboard and mouse
>> >> APEX MI-0008 case.
>> >> Also has:
>> >> parallel port available on mother board, you extend to a connector
>> >> RS232 serial port available on mother board, you extend to a
>> >> a single DC power supply from 11 to 19 V DC.
>> >> 1 each PCIe expansion port, I will use with a premium 4 channel
>> sound card
>> >> SATA ports available for HDD/SDD,
>> >> USB ports are available,
>> >> Motherboard sound, and Gigalan.
>> >> I have not played with NTP, (yet), but it sounds like a decent time
>> >> technical challenge.
>> >> My application is for a remote site with only 13V DC power
>> available from
>> >> PV/batteries.
>> >> Then use fiber ethernet to get off site.
>> >> The INTEL website would have further details.
>> >> Stan, W1LE Cape Cod FN41sr
>> >> ZZZZz
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