Green Gigabit Network Switches

Are your network switches energy efficient? I thought mine were.

A couple of years ago when upgrading my network at home I installed some new 8-port D-Link Green gigabit switches. At the time I was mostly concerned with ‘jumbo packets’ and streaming media, the warranty, and the green stuff was just a nice bonus.

Recently though as I’ve been adding / changing network equipment, I’ve been going through the home network, benchmarking how much power is being used to try and minimize electrical waste. It’s kind of fun in a sad nerdy way.

Today I’m adding another 8-port gigabit switch to my LAN to be used as an iSCSI backbone. I thought about buying another D-Link green switch, but decided to take the scientific approach. Considering that my existing 2-year-old switches were ‘green’ already, this project yielded another big surprise.


D-Link 8-port gigabit green switch #DGS-2208D-Link 8-port desktop green switches
(one upstairs, one downstairs)

  • 8-port
  • 10/100/1000
  • MAC Address Table: 8k
  • Switch Fabric: 16 Gbps
  • Jumbo frame support: up to 9600 Bytes
  • Part #DGS-2208
  • Street Price: about $58
  • Limited lifetime warranty

These switches performed well for me and handled the job of streaming HD content and moving VHD and ISO files across the LAN with no problems. When I bought these switches 2 years ago, the box stated a power savings of up to 80%, which sounded greener to me.

TRENDnet 8-port gigabit green switch #TEG-S80GNEW SWITCH

TRENDnet 8-port desktop green switch
(being added as an iSCSI backbone on the LAN)

In the past, I wasn’t a big fan of TRENDnet. Their blue plastic hardware looked like something made by Fisher Price in the 70’s, but not anymore. These new switches have a sturdy metal housing, and I like them.

These two switches are very ‘apples-to-apples’ in network specs.


I intentionally benchmarked both switches at 75% capacity (6 ports used with 2 ports unused). The reason being, I don’t like to use all the ports in a switch. In case a port goes bad you still have a couple of extra ports left and don’t have to replace the whole maxed-out switch.

On to the test results…

P3 Kill A Watt test with zero ports used (just turning on the switch):

  • D-Link at 0% capacity: 4.7 Watts ($2.91 / year)
  • TRENDnet 0% capacity: 1.1 Watts ($0.68 / year)

P3 Kill A Watt test with six ports used (3 at 1,000 Mbps, 3 at 100 Mbps):

  • D-Link at 75% capacity: 6.2 Watts ($3.84 / year)
  • TRENDnet at 75% capacity: 3.6 Watts ($2.23 / year)

Comparison of 8-port unmanaged 'green' gigabit switches

The TRENDnet 8-port green switch uses about 42% LESS power than the D-Link green switch under the same load (6 ports).

Also, the TRENDnet with 6 computers plugged into it is still using 22% less power than the D-Link with 0 computers plugged in. That’s cool!


  • The D-Link #DGS-2208 is still fairly green and has a better warranty.
  • The TRENDnet #TEG-S80G is greener & cheaper with a shorter warranty.

Both are good switches. I’m only saving about $1.61 in electricity per year on the new switch, so obviously I’m not going to replace the existing D-Links with TRENDnet. But it’s nice to see how much greener things have gotten in just the last 2 years! A 42% greener product over something that is already green is awesome!

Final thought: I considered getting a Netgear #GS108 ($60), which isn’t marketed as a ‘green’ product, yet uses 4.09-4.92 Watts. But the TRENDnet is greener than that and costs $20 less.

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