On Fri, Apr 11, 2014 at 09:25:05AM -0400, Douglas Eadline wrote: > > > On Thu, Apr 10, 2014 at 02:07:40PM +0000, Lux, Jim (337C) wrote: > >> On 4/10/14 5:28 AM, "Piotr Król" <[email protected]> wrote: > > > > The question is if they can beat $14.7/DP GFLOPS (13GFLOPS/$192) ? > > Here are some data points (based on actual measurements): > > For about $3,000 (US) you can easily put together a 4 node > X86 system with $6/DP GFLOPS running HPL. Doubling the > number of nodes would probably preserve this > price-to-performance and get you close to 1 DP TFLOP. > > In terms of Power/Performance it would run at > around .75 Watt/DP GFLOP running HPL.
Thanks Douglas, these numbers force me to do some research. As I wrote in other e-mails I care more about small size and power consumption than performance but I would like to get best available on market. I know that there is no free lunch. I found this two boards very interesting: - Arndale Octa Board (Exynos 5420) with Mali™-T628 MP6 - theoretical max for Mali GPU is 109 GFLOPS (what gives $179/102 DP GFLOPS = 1.79$/GFLOPS) with spec I read that board is powered by 5V/3A adapters (so max power consumption is 15W - 15W/102 DP GFLOPS = 0.14 W/DP GFLOPS). - Odroid-XU with SGX544 MP3 - $169/51.1 DP GFLOPS = 3.3$/GFLOPS, max power 20W, so 20W/51.1 DP GFLOPS = 0.39W/GFLOPS. Performance data came from here: http://kyokojap.myweb.hinet.net/gpu_gflops/ That was best what I can found. I also took a look on Teensy3.1 suggested by Jim. Unfortunately even if I forget about Linux it can compute 0.6 MFLOPS so $19.8/0.9 = 33$/MFLOP :( and power 0.032A*3.3V=0.1056W 0.1056/0.6 = 0.176 W/MFLOPS -> 176W/GFLOPS !? Any suggestion about things that I should take care of when building this kind of low power cluster ? Regards, Piotr Król _______________________________________________ Beowulf mailing list, [email protected] sponsored by Penguin Computing To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
