Chill Off 2 Results presented, October 14 2010!

The results of the Chill Off 2 were presented at the Silicon Valley Leadership Group Data Center Efficiency Summit hosted by Brocade in San Jose, CA.

The presentation was moderated by Jeremy Rodriguez, Co-Chair of the DCP Technology Advisory Board. On the panel were Henry Coles from Lawrence Berkeley National Labs, Mike Ryan from Google (DCP TAB Member) and Dean Nelson from Ebay (DCP Chairman and Founder).

Henry Coles, who defined the metrics and executed the independent testing presented the findings before the panel discussion. See the full report on the LBNL website.  Also, you can view all of the Chill Off 2 product videos on the DCP YouTube channel:

After the CO2 results were presented and the panel discussion concluded, Dean Nelson surprised the audience with a peak into the pre-test of the Chill Off 3. Stay tuned to this page for more details on those pre-test results and the upcoming Chill Off 3 testing in 2011. For more information, email


What did we accomplish?

  • Expand on 2007-08 Chill Off testing
  • Compare current cooling technology efficiencies with compute loads between 6kW-30kW/per cabinet
  • Compare cooling performance w/ higher air inlet, varying supply water temperatures, & varying/mixed work load
  • Compare vertical vs horizontal compute scaling
  • Compare powering-off vs power-throttling of servers
  • A controlled test environment that will enable equal comparative testing between the different solutions
  • Publish an industry report on the findings
  • Continue to foster the cooperative and innovative work of the SVLG datacenter demonstrative projects



Chill Off 2 Videos

Chill Off 2 - Clustered Systems (BitFridge) - December 22, 2009

In this episode, Dean Nelson interviews Phil Hughes, CEO of clustered systems. This is a follow up to episode 3 where Dean introduced Phil's cold plate concept and challenges him to prove it's potential. Phil's team built this new rack to participate in the chill off 2. 36 servers in one standard sized rack with refrigernant cooling and no fans in the servers. Explore the rack that Dean dubbed the "bit fridge".

Chill Off 2 Liebert XDR - November 9, 2009

In this episode, Brian Day talks with Doug Werner from cooligy about their XDR solution. XDR is a 20kW passive rear door heat exchanger that works with the standard connecters used in XDV and XDH type deployments.

Chill Off 2 APC Hot Aisle Containment - November 5, 2009

In this episode, Brian day interviews Kevin Lempke, senior product manager for APC. APC particiapted in the Chill Off 1. Brian explores what has changed with their setup and how they believe they will fare in the test.

Chill Off 2 IBM iDataPlex - October 9, 2009

In this episode, Brian Day interviews Ken Schneebeli from IBM. The iDataPlex is a fully integrated compute and cooling solution that is 48" wide and 24" deep. But, it has the ability to incorporate a passive rear cooling door onto a fully configured rack of 84 nodes.

Chill Off 2 Knuerr - October 8, 2009

In this episode, Brian Day interviews Jerimiah Chee from Knuerr, an Emerson Electric company, abou
t their Cool Loop contained rack solution. Side mounted cooling solution meant for data centers that have height limitations. Jeremiah breaks down the features of this product.

Chill Off 2 Vette - October 1, 2009

In this episode, Brian Day interviews Ken Schneebeli from IBM. Ken details the Vette passive cooling door solution that is under test in the Chill Off 2. Vette participated in the first chill off with impressive results. Ken details how the newly improved door will perform in this test.

Chill Off 2 Rittal - October 8, 2009

In this episode, Brian Day interviews Stan Levenstone from Rittal on their LCP+ containment solution under test in the chill off 2. This is the second round for Rittal in the Chill Off testing. They modified their product based on the findings from the first Chill Off. Stan explains these changes and the overall working of their product.

Chill Off 2 OSIsoft - October 7, 2009

In this episode, Brian Day interviews Prajesh Bhattacharya from OSIsoft. OSIsoft is the collection and analytics engine used to capture over 5000 points in the chill off test.  Prajesh steps Brian through the setup and the large volume of measurement data that is captured and analyzed during the tests.

Chill Off 2 Server Tech - October 1, 2009

In this episode, Dean Nelson interviews Graham Leondard fro ServerTech about the Intelligent Rack Power Distribution Units that they donated to the Chill Off 2 testing. The PDUs are an integral part of the testing as they monitor to the plug level as part of the 5000 different points measured 

Chill Off 2 Knuerr CoolTherm Test - June 9, 2009

In this episode Dean Nelson interviews Heiko Ebermann, the Global Product Manager of Thermal Systems with Kneurr. Their CoolTherm product is the first to be tested in the chill off 2. It is a contained water cooled rack up to 35kW in 37U. For more information visit the Chill Off home page at

Chill Off 2 Testbed - April 10, 2009

In this episode Brian Day and Mike Ryan step us through the testing environment for the Chill Off.  This will be the location for all 12 of the 13 different cooling technology tests for the Chill Off.  Numerous companies have donated design, parts and installation services to get this environment together, including Sun Microsystems, Redwood City Electric, SynapSense, Western Allied, California Hydronics Corp, Norman S Wright Mechanical Equipment Corporation, F Rogers insulation & Specialist Contractors, and Liebert Corp.

Chill Off 2 Call For Hardware - February 5, 2009

In this episode, Brian Day, the Chill Off Program Manager puts out a call for hardware to mix up the test environment and help achieve 30kW rack load densities in the test.  Any partners, resellers, vendors, dcp members that could help, contact

Chill Off 2 Update - February 4, 2009

In this episode, Dean Nelson introduces Brian Day, the Chill Off 2 Program manager and gives an update on the participants, real world testing load and the schedule.

Clustered Systems - February 4, 2009

In this episode, Dean Nelson and Phil Hughes show the prototype of the fanless server solution from clustered systems using cold plate technology to remove the heat. This is the first proof of concept with the equipment that will be used in the overall SVLG chill off over the next 6 months.

Chill Off Intro (part 1 & 2) - January 3, 2009

In this Data Center Pulse episode, Dean Nelson introduces the The Chill Off 2 (part 1).  A testing effort to find the efficiency of data center cooling, power and compute devices. The Chill Off is sponsored by the Silicon Valley Leadership Group (SVLG), Data Center Pulse and Lawrence Berkeley National Labs (LBNL). See more at



Chill Off 2 Pictures

Click images to enlarge



The following companies have contributed immensely to the construction and setup of the Chill Off test environment



  • OSIsoft (Complete data collection and reporting system)
  • Redwood City Electric (Electrical installation)
  • Sun Microsystems (PDUs)
  • eBay (servers and workload simulation)
  • SynapSense (Remote sensors)
  • Western Allied (engineering and labor for mechanical, CW infrastructure)
  • California Hydronics (chilled water pump donation)
  • Norman Wright Mechanical Equipment Corp (VFD donation)
  • F Rodgers Insulation & Specialty Contractor (Pipe insulation materials and labor)
  • ServerTech (Rack PDUs)