Selfhosted

I bought a used m920q for this reason, still working on it, I'm at the docker-compose phase

You could ask the question for video gaming. Can a used computer do the job? Yes, but you may not be able to play cutting edge / demanding games if your computer lacks the appropriate hardware. It really depends what kind of things you want to do, for choosing hardware that's powerful enough.

Jellyfin? You need to consider if you need transcoding. Transcode or not makes quite a difference on the hardware needs.

I think that's preferable. I have resused my old gaming computer as a server since I stopped gaming for a while.

There are a lot of ways to go. My own isn't particularly efficient, but it's an old rack mount server. Everything is built like a tank. It's robust as hell, and yet everything was well used and cheap. Probably not a good solution if you live somewhere with expensive power, but I don't.

I just got a great Jellyfin+*arr setup running off of an old PC. Let me know if you need a hand

Generally speaking, yes. My home server is just a Pi.

My server is an HP Small Form Factor Corei5 32GB RAM that I bought on a second hand shop. The thing I paid attention the most was the i5's gen, as some older ones don't include h265 transcoding acceleration, or sometimes h264. This is rather important for Jellyfin. ANything else, just go with it and try!

If you aren't worried about power costs, yes, go for it.

I calculated the energy cost of running a 100w PC 24/7 for 2 years, covers the cost of a new mini PC + 2 years of its own energy cost. So I just bought a NUC which draws 7-8W. Less noisy too. Laptops usually draw less than desktops though so you may be good there.

It depends on what you are running, but at one point I had an Odroid N2+ with 8GB RAM running Home Assistant, mpd, Snap server, zwavejs, mympd, jellyfin, and Calibre, all in containers, controlling the house and providing music for the sound system, playing movies, and with no issues. It ran for 7 years. So you don't need much; memory helps.

Oh - I take it back; after I put Jellyfin on it, it would struggle with transcoding. No GPU, old, weak CPU, whatever. But otherwise, it was fine.

At some point I realized I'd have to leave the computer with the house, because I have over 30 hardwired z-wave devices I'm not taking out if we sell, so I moved all of the services except Home Assistant and zwavejs to another computer.

My point is: old computers should be fine, assuming you're not trying to run LLMs on them. Or going heavy video transcoding. Just for serving up some web applications? You don't need much.

Yea definitely. I started tinkering with my first server in 2020 and used an ewaste dell tower with an i7 3770 (8 years old at that point) and an old rx460 I had laying around. As others mentioned power consumption was way worse than modern hardware. But I had at one point a half dozen people streaming jellyfin 1080 content from it with no hiccups at all. That said I was running on linux, not sure how it would do if you run windows.

Right now I'm using a low power pc to run my server, again an old ewaste dell micro pc with a 5th or 6th gen i5 and no dedicated gpu. Still no problem streaming to my partners and I's phone/tablet simultaneously. Again, running linux.

I'm running my Proxmox VE on a small asus mini pc with embedded cpu. It can't even match a 5 year old i3 and I'm having no issues.

Running mainly containers and small projects

Yes, a used PC can work great for a home server. Just don't go too old or it will be power hungry. Obviously you will want one with an integrated GPU to save power too. If you want to run jellyfin, make sure it supports hardware video encoding, preferably AV1 or H.265.

I have two servers/mini lab / whatever you want to call em. Ones running unraid and is my main server Frankensteined from an old mini itx mobo off of ebay with an Intel quicksync capable cpu. And the others a $80 Lenovo m93p that I just installed Ubuntu server + casa os to mess around with it.

This was maybe 2-3ish years ago;

I started with a raspberry pi 4 bundle from Amazon, played around with the Linux filesystem, bash shell, APT package manager and just kept reinstalling the headless Debian 12 OS if I believed to have bricked it beyond repair.

Eventually learned about the Docker Engine & Docker Compose and that essentially gave access to a plethora of software I would’ve have never have used before.

The raspberry pi 4 started to show sluggishness as I started piling more and more services on it so, Instead of buying traditional server grade hardware I liked the small form factor of the Pi so I opted for a 13th gen Asus Nuc with an 12 core i7.

Everything runs beautifully now and I even run Debian 12 on my desktop as well!

Servers are just really big computers. I started off with a Chinese Raspberry Pi clone, then upgraded to an old mac mini + mini pc + a cheap cloud server (VPS). As you can see, you can turn any old computer into a server.

The cloud is expensive but reliable. Having your own server is cheap but it will go offline with every network fault or brownout. If you’re serious about self hosting I suggest buying a UPS.

Whatever computer you decide to use as a server, make sure it is quiet. When I first started, I tried to use an old 2010 aah workstation as a server, but the fans were so loud I couldn’t sleep, it was driving me crazy.

Its less of a need for powerful hardware and more of a want.

I started off my days with a laptop that had a broken screen. I took screen off and hid it behind my desk, worked perfectly fine, even came with a built in backup battery too xD

When I started my home server was an old laptop, eventually it became an old desktop, and now it's server specific hardware. My recommendation is use whatever you have at hand unless you have specific reasons. I went from laptop to desktop because I needed more disk space, and went to specialized hardware for practical reasons (less space, less electricity, easily accessible hot swappable hard drives). But for most of the stuff I have there an old laptop would still be enough, heck, a raspberry pi would be enough for most of it.

I started with my old gaming rig as a server, any decent intel cpu with quicksync is very good for plex and transcoding saving having to buy a cpu if you went with like a server grade cpu with no igpu

My current home server that runs three dozen containers including Plex and Emby as well as two dozen other services and many terabytes of data is literally an old Lenovo desktop I got for free out of somebody’s garage 14 years ago. So yeah it’s sort of a perfectly fine place to start.

I started out with an old laptop then eventually "upgraded" to a refurbished office surplus desktop. I highly recommend starting out on a project PC as a sort of proof of concept before investing any money into it. Even hosting the family media libraries, I have never had an issue with streaming video, etc. even with pretty dated hardware.

I use a couple of old HP proliant mini towers. Relatively low power consumption, i7 CPUs and 32GB of RAM. I got mine from ewaste but it's the sort of thing you can easily find refurbed for the price of a high end Raspberry Pi.

Hardware requirements really depend on what you want to do with the server. I have a few raspberry pi, an old PC, and at least one or two old laptops to host things on. But really, I use the old PC the most. It pulls more power than a raspberry pi, but I've found it to be much more reliable and stable.

Drop some additional hard drives if you need a media server. More memory & CPU if you are doing things like manipulating images or transcoding video. I run a webserver and host various subdomains for things I don't want to pay to host. Plus working samples of my portfolio projects. I keep my actual portfolio on cloudflare, but link out to these work samples.

I also host some other apps that are just for my home network. Everything works great on a 10 year old PC sitting in a network closet. You are very likely not in need of professional server hardware.

Mine are lenovo thinkcentres, ypu xan get a good cpu, low power usage, up to 32GB RAM, one 2"5 drive + one nvme. Very easy to open and service.

It depends, but probably. I use 5-10yo laptops running Debian.