Evo, iskopao sam negdje dokument sa potrošnjama snage po komponentama, pa si malo pogledajte ako vas zanima... nije baš up-to-date i ne morate se držati toga kao pijan plota, ali za neku okvirnu usporedbu može poslužit:
AMD Athlon 900MHz-1.1GHz - 50W
AMD Athlon 1.2MHz-1.4GHz - 55-65W
Intel Pentium III 800MHz-1.26GHz - 30W
Intel Pentium 4 1.8GHz-2.0GHz - 75W
Intel Celeron 1.0GHz-1.1GHz - 35W
ATX Motherboard - 30W-40W
128MB RAM - 10W
256MB RAM - 20W
AGP video card - 20-30W
PCI video card - 20W
12X or higher IDE CD-RW Drive - 25W
7200RPM IDE Hard Drive - 13W
7200RPM SCSI Hard Drive - 24W
Floppy Drive - 5W
Network Card - 4W
Modem - 5W
Sound Card - 5W
SCSI Controller Card - 20W
Firewire/USB Controller Card - 10W
Case Fan - 3W
CPU Fan - 3W