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<p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D">The Little FE portable HPC cluster might be of interest on this topic. It is an HPC system build with small form factor motherboards to get a 6 node Beowulf
cluster that can be powered off a standard 110 receptacle and used as a training system in public schools as it can be run in the classroom. The boards they use are not power house boards, but the size of the cluster would make it possible it a battery pack
to run a backpack Beowulf cluster. Their website is <a href="http://www.littlefe.net">
www.littlefe.net</a><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Scott<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-GB" style="font-size:14.0pt;font-family:"Verdana","sans-serif";color:#1F497D;mso-fareast-language:FR">Scott Hamilton</span></b><span style="font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:FR"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:14.0pt;font-family:"Verdana","sans-serif";color:#1F497D;mso-fareast-language:FR">Solution Architect II</span><span style="font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:FR"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:14.0pt;font-family:"Verdana","sans-serif";color:#1F497D;mso-fareast-language:FR">Atos Big Data & Security – NAO</span><span style="font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:FR"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Verdana","sans-serif";color:#1F497D;mso-fareast-language:FR">(573)324-7124<o:p></o:p></span></p>
<p class="MsoNormal"><u><span style="font-size:14.0pt;font-family:"Verdana","sans-serif";color:blue;mso-fareast-language:FR"><a href="mailto:scott.hamilton@atos.net"><span style="color:blue">scott.hamilton@atos.net</span></a></span></u><span style="font-size:14.0pt;font-family:"Verdana","sans-serif";color:#1F497D;mso-fareast-language:FR"><o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Beowulf [mailto:beowulf-bounces@beowulf.org]
<b>On Behalf Of </b>John Hearns<br>
<b>Sent:</b> Thursday, January 19, 2017 9:35 AM<br>
<b>To:</b> beowulf@beowulf.org<br>
<b>Subject:</b> Re: [Beowulf] Mobos for portable use<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black">Jim,
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black">I am a big fan of the Xeon-D but they take 45Watts for the CPU alone. Full featured Xeon and two 10gig ports on board though.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black">I would be looking at one of the Nvidia boards intended for in-car systems.<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black"> Beowulf [beowulf-bounces@beowulf.org]
on behalf of Lux, Jim (337C) [james.p.lux@jpl.nasa.gov]<br>
<b>Sent:</b> 19 January 2017 14:36<br>
<b>To:</b> <a href="mailto:beowulf@beowulf.org">beowulf@beowulf.org</a><br>
<b>Subject:</b> [Beowulf] Mobos for portable use</span><span style="color:black"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black">This comes up every few years..<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black">Someone at work was complaining at lunch that the latest laptops have nice screens but don’t have much memory, largely because they want to keep the battery size reasonable ("thin is in”).. my suggestion was “well,
why don’t you just use your laptop as the user interface to a bigger more powerful compute node/nodes”<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black">That devolved into a “but what I really want is the horsepower of my desktop machine”..<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black">Leaving aside the “use the network to connect to a CPU somewhere else”<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black">We then started discussing whether anyone makes motherboards with high performance processors, lots of RAM, maybe a GPU for computation (but no display hooked up), but none of the other stuff, and then run off
batteries..<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black">Like a battery powered Intel NUC, but with way more horsepower<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black">The top of the line NUC seems to have a 19V, 65W power supply.. arstechnica says they burn about 50W running full out. Let’s say you want to run for 4 hours, so you need 200 Whr.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black">A 18650 Li battery is 3.4 Ah @ 3.6V, that’s about 23 Wh, so you’d need 9 of them. That’s not all that big a package.. Arranged in a row, they’d be 65mm by 162 mm.. <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black">Prismatic (brick shaped) batteries are 350 Wh/Liter, 135Wh/kg.. so 200 Wh is going to be about half a liter (50x100x100 mm) and 1.5 kg<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D">James Lux, P.E.</span><span style="font-size:11.0pt;color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D">Task Manager, DHFR Space Testbed</span><span style="font-size:11.0pt;color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D">Jet Propulsion Laboratory</span><span style="font-size:11.0pt;color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D">4800 Oak Grove Drive, MS 161-213</span><span style="font-size:11.0pt;color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D">Pasadena CA 91109</span><span style="font-size:11.0pt;color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D">+1(818)354-2075</span><span style="font-size:11.0pt;color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D">+1(818)395-2714 (cell)</span><span style="font-size:11.0pt;color:black"><o:p></o:p></span></p>
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