Menu Energy Efficient Computing
Energy Efficient Computing, lecture at 'What the hack'
Current Power management
APM (Advanced Power Management): BIOS driven
ACPI (Advanced Configuration & Power Interface): OS driven
Energy Star; some figures
Energy issues PC's
- Processor: speed race, limits single-processors
Dual core, 'mobile' processors in desktop, low power CPU's
- Video card: up to 150 watt
Nvidia GeForce 6800 Ultra: 29-72 watt
Ati Radeon X800 PE: 18-63 watt
More efficiency needed (could save 30% alone)
Right size (watts)
Good Power Factor means smaller UPS
- Voltage regulator motherboard
12 VDC -> Vcore voltage for processor, efficiency 75-80%, with less than 20 watt load very bad efficiency
Measurements / Metingen
Ever growing; more resources needed, less stable
Impact spam/viruses on infrastructure and datacenters
Boyd's energy efficient PC
Energy Star 2007
Appeal to industry
Would we accept our new car using twice the gas? With PC's we do ...
As THE high tech representative in the home and office, THE progressive industry, ICT should set an example and lead the way. I'd like to see more of a 'hackers' mentality in industry: let us finally make computers behave like they can and should behave!
PC's are idle 90-98% of the time they are switched on. So it is the idle state of a desktop computer where the energy savings must be made. The Energy Star specification draft for 2007 allows for max. 50-60 watt energy use by a idle PC. This must come down to at least 20 watt! And that really is no problem: Using 'of the shelf' laptop-technology, costing only a few dollars/euros, it is quite possible to reach figures well below 20 watt.