2. Green computing is the study and practice of using
computing resources efficiently. The primary objective of
such a program is to account for the "People, Planet,
Profit” to maximize energy efficiency during the product's
lifetime and promote recyclability or biodegradability of
defunct products and factory waste.
Modern IT systems rely upon a complicated mix of people,
networks and hardware as such, a green computing
initiative must be systemic in nature.
3. In 1992, the US Environmental Protection
Agency launched “Energy Star”, a voluntary
labeling program which was designed to
promote and recognize energy efficiency in
monitors, climate control equipment, and
other technologies. This resulted in the
widespread adoption of sleep mode among
consumers of electronics.
The term "green computing" was probably
coined shortly after the “Energy Star
“program
4. As computers play an ever-larger role in our lives, energy
demands, costs, and waste are escalating dramatically.
• The added heat from inefficient computers can increase the
demand of air conditioners and cooling systems, making
your computing equipment even more expensive to run.
• Even though most of today’s desktop computers are
capable of automatically transitioning to a sleep or hibernate
state when inactive, about 90% of systems have this function
disabled
5. Desktop consumption
has reached 100 watts
Total Personal
Computer(400 million)
energy usage in 2000
was 26 nuclear power
plants
Power is the
bottleneck of
improving the system
performance Water Cooled Computer
Power consumption is
causing serious
problems because of 5
6. Nuclear
1000 Reactor
Power Density (W/cm2)
Pentium 4
Hot Pentium 3
100 Plate
Pentium 2
Pentium Pro
Pentium
10 486
386
1
1980 1990 2000 2010
7. In order to achieve sustainable computing, we need to
rethink from a “Green Computing” perspective,
because :
Green Computing:
*Maximize energy efficiency
*Reduce of the use of hazardous materials
such as lead
*Maximize recyclability of both a defunct
product and of any factory waste
8. • Understand all levels of the
computer
• Understand where power is
dissipated
• Think about ways to reduce power
usage at all levels
9. THE 6 LEVELS OF A COMPUTER
5 High Level Programming
4 Assembly Language Software
3 Operating System
2 Instruction Set Architecture
1 Digital Logic Hardware
0 Integrated Circuit
8 9
10. • An average desktop computer requires 85 watts just to be
idle, even with the monitor off. If that computer were in use or
idling for only 40 hours a week instead of a full 168, over $40
in energy costs would be saved annually.
• If each household in a region the size of the metro Boston
area turned off its computer for just one additional hour per
day, it would save $3.2 million in electricity costs and prevent
19,000 tons of CO2 from heating the atmosphere.
• Electricity production is the largest source of greenhouse
gas emissions in the United States, ahead of transportation.
11. “The performance of software systems is
dramatically affected by how well software
designers understand the basic hardware
technologies at work in a system.
Similarly, hardware designers must understand
the far-reaching effects their design decisions
have on software applications”
12. Our computer’s SLEEP and HIBERNATE settings are two of the most
effective ways to make our computer more environmentally friendly.
SLEEP MODE
Sleep mode conserves energy by cutting off power to our display, hard
drive,
and peripherals. After a pre-set period of inactivity, our computer
switches to a low power state. .
HIBERNATE MODE
Hibernate mode saves energy and protects our work by copying system
data to a
reserved area on our hard drive and then completely turning off our
computer. It also reduces wear and tear on our components. When we
turn power back on,
our files and documents appear on our desktop just as we left them.
15. The efficiency of algorithms has an impact on the amount of
computer resources required for any given computing function
and there are many efficiency trade-offs in writing programs.
As computers have become more numerous and the cost of
hardware has declined relative to the cost of energy, the energy
efficiency and environmental impact of computing systems
and programs has received increased attention
16. The Advanced Configuration and Power Interface (ACPI), an
open industry standard, allows an operating system to directly
control the power saving aspects of its underlying hardware.
This allows a system to automatically turn off components
such as monitors and hard drives after set periods of inactivity.
In addition, a system may hibernate, where most components
(including the CPU and the system RAM) are turned off.
17. A fast CPU may be the largest power consumer in a computer.
Energy-efficient display options include:
•No video card - use a shared terminal, shared thin client ,
or desktop sharing software if display required.
•Use motherboard video output - typically low 3D
performance and low power.
•Select a GPU based on low idle power, average wattage,
or performance per watt.
18. CRT monitors typically use more power than LCD
monitors. They also contain significant amounts of
lead. LCD monitors typically use a cold-cathode
fluorescent bulb to provide light for the display.
19. The recycling of old computers raises an important
privacy issue. The old storage devices still hold private
information, such as emails, passwords, and credit
card numbers, which can be recovered simply by
someone's using software available freely on the
Internet.
20. Teleconferencing and telepresence technologies are
often implemented in green computing initiatives. The
advantages are many:
• Increased worker satisfaction,
•Reduction of greenhouse gas emissions related to
travel,
•Increased profit margins as a result of lower overhead
costs for office space, heat, lighting, etc.
21. • Turn off the computer when not in use, even if
just for an hour.
• Turn off the monitor when not in use (as
opposed to running a screen saver).
• Use power saver mode.
• Use hardware/software with the Energy Star
label.
• Don’t print unless necessary.
• Use LCDs instead of CRTs as they are more
power efficient.
