I keep hearing about "power hungry" old computers, but the current multicore computers use more power. The CPU alone uses more than 100 watts for most processors. I got a quad core that advertised as low power at 95 watts, and the computer burns 140 watts. The old P3 uses around 40 watts. So the computer probably burns no more than 100 watts. The only new PCs that use less power are the mini itx computers and laptops.