Power usage of various devices
Average power usage
| Monitor | When on | When power saving | When off |
|---|---|---|---|
| Samsung 55" LCD HDTV | 150W | Unknown | 1W |
| Viewsonic 32" LCD HDTV | 120W | Unknown | < 1W |
| Viewsonic 19" LCD | 31W | 0W | 0W |
| Viewsonic 20" 2030m LCD | 45W | 0W | 0W |
| Viewsonic 20" 2030wm LCD | 35W | 0W | 0W |
| 17" CRT | 70W | Unknown | Unknown |
| 19" CRT | 100W | Unknown | Unknown |
| 21" CRT | 115W | Unknown | Unknown |
| Device | When on | When power saving | When off |
|---|---|---|---|
| Intel Mac Mini | 28W | 2W | 1W |
| Intel iMac 24" | 130W | 4W | Unknown |
| G4 17" laptop | 27W | 2W | 1W |
| Gustavus G43 | 73W | Unknown | 0W |
| Gustavus 965 | 73W | Unknown | 0W |
| Gustavus G35 | 73W | Unknown | 0W |
| Thinkpad Core Duo | 17W | 0W | 0W |
| MPC 385 | 60W | 3W | 2W |
| MPC 375 | 85W | 4W | 3W |
Electricity Costs
The college currently spends about $0.12 per kwh (including the increase in peak usage assuming the device will be on during the peak usage time)
That comes out to be about $1.05 per watt per year. Therefore, a computer which uses 185W with its monitor costs the college about $160/year more than a laptop which uses 15W if the computers are left on all the time. If they are used 33% of the time (8 hours a day) it costs $56 per year more.