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Activating Power Management on PCs saves money

Gartner has published an article that shows that by simply activating power management on PCs, an organisation of 2500 PCs can save 43% of the power consumed by those PCs (433 MWh), which translates to an annual saving of about R240 000 in South African terms. Furthermore, planned Eskom tariff increases will escalate these savings rapidly.

The university probably houses up to 8000 PCs that could be managed. This excludes the 5000 or so student PCs in university hostels. The potential savings in both power and cost rapidly become very significant (remember this excludes potential savings in air-conditioning power because of the lower heat load from PCs), especially if one considers that the university’s total annual power bill is some R35 million.

Of course, the article does make a number of assumptions about the types and usage patterns of PCs. On the one hand the university probably owns far more PCs with screens than notebooks – this would increase the potential saving in our case. On the other hand, student usage patterns are not limited to 8-hour days and may occur at off-peak hours – this would tend to lessen the extent of potential savings.

PC power consumption is clearly not insignificant – as many have assumed. Substantial savings are possible through fairly simple changes in policy.

All staff members and students can access this Gartner article:

  1. First log on to Gartner
  2. then click on this link

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2 Responses to “Activating Power Management on PCs saves money”

  1. Tim James says:

    If you are serious about power management you should be looking at tooling to support the infrastructure. The best solution on the market is NightWatchman and WakeUP from 1e, represented in South Africa by yours truly, sustainableIT based in Cape Town and just down the drag! You are right, there are massive savings in this space, particularly when devices are left on overnight.

    We have in fact two case studies in this space in academia, The University of Southern Denmark and Central Connecticut State University. Both on our website under Resources | Case Studies.

    If you are serious about saving energy, get that powers that be to give us a shout.

  2. Tim James says:

    Ralph, sorry to blog this but don\’t have your email address. Are you guys aware of this http://www.powerdownfortheplanet.org/

    Based on what you are trying to achieve, you might get some goodwill by joining up! Just trying to save the planet one step at a time 🙂

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