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Don't throw away your old PC—it makes a better NAS than anything you can buy
(www.howtogeek.com)
this post was submitted on 30 Nov 2025
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OK. Science time. Somewhat arbitrary values used, the point is there is a amortization calculation, you'll need to calculate your own with accurate input values.
A PC drawing 100W 24/7 uses 877 kWh@0.15 $131.49 per year.
A NAS drawing 25W 24/7 uses 219 kWh@0.15 $32.87 per year
So, in this hypothetical case you "save" about $100/year on power costs running the NAS.
Assuming a capacity equivalent NAS might cost $1200 then you're better off using the PC you have rather than buying a NAS for 12 years.
This ignores that the heat generated by the devices is desirable in winter so the higher heat output option has additional utility.
I bought a two bay Synology for $270, and a 20TB hdd for $260. I did this for multiple reasons. The HDD was on sale so I bought it and kept buying things. Also I couldn't be buggered to learn everything necessary to set up a homemade NAS. Also also i didn't have an old PC. My current PC is a Ship of Theseus that I originally bought in 2006.
You're not wrong about an equivalent NAS to my current pc specs/capacity being more expensive. And yes i did spend $500+ on my NAS And yet I also saved several days worth of study, research, and trial and error by not building my own.
That being said, reducing e-waste by converting old PCs into Jellyfin/Plex streaming machines, NAS devices, or personal servers is a really good idea