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<div style="direction: ltr;font-family: Tahoma;color: #000000;font-size: 10pt;">Jim,
<div>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.</div>
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<div>I would be looking at one of the Nvidia boards intended for in-car systems.</div>
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<div id="divRpF642104" style="direction: ltr;"><font face="Tahoma" size="2" color="#000000"><b>From:</b> 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> beowulf@beowulf.org<br>
<b>Subject:</b> [Beowulf] Mobos for portable use<br>
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<div>This comes up every few years..</div>
<div>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”</div>
<div>That devolved into a “but what I really want is the horsepower of my desktop machine”..</div>
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<div>Leaving aside the “use the network to connect to a CPU somewhere else”</div>
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<div>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..</div>
<div>Like a battery powered Intel NUC, but with way more horsepower</div>
<div>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.</div>
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<div>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.. </div>
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<div>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</div>
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<p class="MsoNormal" style="margin:0in 0in 0.0001pt; font-size:11pt"><span style="color:rgb(31,73,125)">James Lux, P.E.</span></p>
<p class="MsoNormal" style="margin:0in 0in 0.0001pt; font-size:11pt"><span style="color:rgb(31,73,125)">Task Manager, DHFR Space Testbed</span></p>
<p class="MsoNormal" style="margin:0in 0in 0.0001pt; font-size:11pt"><span style="color:rgb(31,73,125)">Jet Propulsion Laboratory</span></p>
<p class="MsoNormal" style="margin:0in 0in 0.0001pt; font-size:11pt"><span style="color:rgb(31,73,125)">4800 Oak Grove Drive, MS 161-213</span></p>
<p class="MsoNormal" style="margin:0in 0in 0.0001pt; font-size:11pt"><span style="color:rgb(31,73,125)">Pasadena CA 91109</span></p>
<p class="MsoNormal" style="margin:0in 0in 0.0001pt; font-size:11pt"><span style="color:rgb(31,73,125)">+1(818)354-2075</span></p>
<p class="MsoNormal" style="margin:0in 0in 0.0001pt; font-size:11pt"><span style="color:rgb(31,73,125)">+1(818)395-2714 (cell)</span></p>
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