Power Tests (130w for 24 Nodes)

We’ve been busy working on optimising the power draw on our product, improving airflow, tweaking low level system settings, playing with PSUs and exhaustively programming fanspeeds..  Now it’s time for some real world tests, measured “at the wall”!

System used for the tests:

  • Boston Viridis with 24 nodes (6 energy cards)
  • 24x 256GB SSD drives
  • 4GB Ram per node (96GB in total)

Test conditions:

We ran the tests over a 30 minute period, taking results after 15 minutes at 1 minutes intervals. The results were averaged across this period of time and the power measurements were recorded on a Rohde & Schwarz HAMEG HM8115-2


These are some excellent results and really show what our solution is capable of running some real world workloads. Just to put this in perspective, a standard x86 dual socket server can run anywhere up to 350w! Our 24 node configuration is roughly equivalent to a standard low power dual socket x86 system (with regards to power consumption).

Update: Further evidence of the power consumption figures above from our friends at calxeda:

4 thoughts on “Power Tests (130w for 24 Nodes)

  1. Pingback: The World’s First 130 Watt Server Cluster – ARM Servers, Now!

  2. Pingback: Boston Viridis Project Shows Energy Efficiency of ARM Servers | insideHPC.com

  3. Thank you for sharing great information. I have one question. Idle power consumption (Linux at rest) shown here is 5.5W per node. How much power is consumed by the energy core node itself (excluding DDR, SSD, and others) at that state?

    • That’s a good question. An exact measurement is a little more tricky than it sounds as some of these devices are obviously necessary in order to achieve the idle score.

      That said, removing measured and calculated power figures for DRAM, SSDs, storage backplane, cooling fans, system board, PSUs, network transceivers, etc, etc, we see per node idle power in the region of 600mW.

      That’s 600mW for the quad-core processing complex, interface complex, management subsystem and network fabric switch!

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