Comments on: Electric slide for tech industry?

Rising power consumption puts pressure on server makers to tame gear that's running hotter and hungrier.

[cyn1c]

Power Supply Efficiency

"The EPA lets manufacturers give such supplies, which convert AC power from the wall to DC power used inside the computer, an "80+" label if they're more than 80 percent efficient. That "Energy Star" label means that they lose less than 20 percent of the power they draw in waste heat. But efficiencies of only 70 or 72 percent are typical for power supplies."
Efficiency measurement is going to depend on power supply loading. There is no efficiency constant for the power supply, it is a curve from light load to full load, reaching a peak somewhere in the middle (like 75% full load).
Perhaps if power supplies were better selected for their specific use, they could achieve real improvements in wasted power reduction. I get the feeling that the power supply is usually an afterthought, oh 550 Watts that ought to be enough.

[mendozamanny]

72-75%??? 80+ Power Supplies is the way to go.

I have been pushing 80+ Seasonic Power supplies. PG&E will not only give a rebate of up to 10.00 for each 80+ power supply in a server, you will save money on your electricity bill and have a cooler system.

www.jameco.com for more information

Teach Them To Fish

Most of the press this week has been focused on what IT equipment and component manufacturers can do, should do and are doing. Not once have I read a single statement that puts any responsibility of efficient energy use back on to the owners and operators of data centers. The industry, as a whole, has provided many best practices documents to help customers make the best of what they have. However, complacency has been the order of the day. Take the basics best practices such as hot-isle/cold-isle, using blanking panels and plugging holes in floors. Over 50% of the computer rooms I've been into don't or won't adopt those practices.
LBNL published a study in Feb 2003 that showed the average energy balance of energy consumption of 12 data centers. Cooling cost as a percentage of overall energy use ranged from as low as 22-25% to as high as 50-55%. Those doing a good job obviously spend less on cooling due to more efficient airflow management. Our Advanced Technology Team in Houston has been been publishing White Papers on best practices for more than three years.
There is a saying "while I'm pointing one finger at you (hardware industry) I must realize the there are three fingers pointing back at me".
Before any hardware solutions can begin to make a significant difference, Computer Room operators and owners need to realize their role and responsibility in using what they have in a practical and efficient manner. Most data centers are so screwed up in their layout and management, no hardware fix will help cure their energy consumption problems.
"Teach them to fish and they can feed themselves".

Bob Pereira
Enterprise Infrastructure Technologist
Industry Standard Server Group
Hewlett Packard

[Zymurgist]

Power supplies?

While I appreciate an efficient power supply as
much as the next guy (and I believe that
efficiency for the EPA is measured at peak
load), how about the components? Those things
are getting *HOT*. If you want to talk
inefficient, there you go.

I'd also add that we home consumers would really
like some of that energy efficiency too. Home
servers, media centers, etc. are getting to be
pretty common. Could we get something that
doesn't dim the lights when we turn it on,
please?

[CableDOC]

Forgotten A/C Loads

The article only briefly mentions air conditioning, yet a 20 kw draw rack consumes 6 tons of A/C, or more than a house. Time for demand loading, or else send all rack rooms to the artic and melt icebergs.

Article about efficient computing that does not mention Opteron?

You guys outdo yourself every time!

[MediaRites]

finger pointing

The government doesn't want to focus on the users because they won't agree to wear the e-star mark on the top or front of their heads. ;-)

Efficiency, Usage, and AC/DC conversion

I would be astounded if the average powers supply
gets over 70% efficiency. More likely is the
situation found with "wall warts" in which the
device consumes 1 watt even if there is no load,
plus 20% of whatever is plugged into it.

If a cell phone charger or similar intermittent
usage device is plugged in 24/7, then you might
see 70% efficiency when the device is actually
charging a battery, and 0% efficiency (100% waste)
when the battery is full. Total system efficiency
might average out to 10% or 20% depending, and
that assumes that the power supply is properly sized to its load.

If, as often happens, the power supply is twice
as large as it needs to be, then there will most
likely be additional base power consumption, which
means that the total efficiency will fall down to
the 60% range.

Computer systems which turn off disk drives, monitors,
etc. do not help with this problem: You have to
disconnect the main power transformer from the
wall plug.

The actual situation with regard to power supplies
is that, while many systems, especially in servers,
are able to achieve efficiency over 75%, there
are a large number of power supplies out there
which are under 20%.

[mastmar221]

Factual Errors

Sorry to nit pick, but this is a little bit of home town pride. While the mall of america is the largest mall in the US, it is not the largest in the world. Edmonton, Alberta in Canada has the largest mall in the world named West Edmonton Mall. Sorry guys.