<div dir="ltr"><div><div><div>Hello,<br><br></div>I'm looking into machine learning and it seems like some of the methods could potentially just keep getting better the more data/computational power you throw at them. I'm not really skilled enough to do to much with them yet, but I wanted to go ahead and see what sort of setup it might be good to build once I have sufficient experience in the area.<br><br></div>Wikipedia has a list of the most power/price computers in the world (<a href="http://en.wikipedia.org/wiki/Flops">http://en.wikipedia.org/wiki/Flops</a>). It is interesting to note that the last two entries are made from commodity PC parts (the latest coming in at $902.57 and delivering 11.5 TFLOPS). It would seem that one way to go would be just build one of these servers with a top of the line GPU.<br><br></div><div>The complicating factor is that the GPU is really power hungry and takes something like > .5 kilowatts to keep running. At normal utility rates, this means that power is going to cost more than the system if it is kept operating continuously for more than a year.<br><br></div><div>The other possible alternatives are building large clusters of Odroid C1s or Raspberry Pi 2.0s, each of which have quadcore arm processors and only take ~2.5 watts to run (equivalent power at 200 units). At the same time, you could probably only have about 18 units at equivalent cost not counting energy.<br><br></div><div>Lastly, you could just build a decked out CPU server. I don't really know how they clock in in terms of power efficiency.<br><br></div><div>A few questions:<br><br>What would you build if you had something that would happily eat as many
parallel flops as you could deliver (with correspondingly increasing
performance)?<br><br></div><div>Does anyone know how GPUs compare to CPUs in terms of power consumption per FLOP?<br><br>At what point does the power cost dominate the computer cost (timescale, hours of expected operation, etc)? <br><br>Also, should this be our new standard way to heat the house during the winter?<br></div><div><br></div><div>Thanks,<br></div><div>Charlie West<br></div><div><br><br></div></div>