553
Don't throw away your old PC—it makes a better NAS than anything you can buy
(www.howtogeek.com)
This is a most excellent place for technology news and articles.
All devices on the computer consume power.
The CPU being the largest in this context. Older processors usually don't have as aggressive throttling as modern ones for low power scenarios.
Similarly, the "power per watt" of newer processors is incredibly high in comparison, meaning they can operate at much lower power levels while running the same workload.