I seed several thousand torrents that compose over 50 TB of content, and qBittorrent barely uses 1-2 gigs of RAM. It uses that little even though I set the max usage to 5gb. As far as the processor goes, that barely gets touched unless I’m doing maintenance and need to recheck the files, in which case my CPU usage hovers around 5% or less. Honestly, the thing that gets the most action from qBittorrent is simply the hard disk. I found the recheck goes faster if I set it to just one at a time so that the disk doesn’t bottleneck—the CPU and RAM will already be more than enough, even on a mid tier machine.

Now Plex on the other hand, that bad boy can max out a CPU like nobody’s business if the settings are right, but since upgrading to a Ryzen 9, even “make my CPU hurt” won’t take it above 80%.

So basically, the torrenting is pretty low footprint, but serving torrented content for streaming, especially when transcoding is involved, can be much more resource intensive.

I seed at least 10 files at the same time on my main desktop and the CPU usage used by the program I use never goes above 0.5%, I can play and do everything I normally do and never have to stop seeding files. In the HDD usage I honestly don't know, although the games I play are on the same HDD that is currently seeding.

Unless you're seeding thousands of torrents all at once, you will love fine.

The processing power vor memory usage seeding files is not worth talking about. Depending on your throughput it can block your network.

Storage of the item is the biggest thing. I have a seedbox with around 87 torrents on it with only 8GB of RAM allocated and two cores in a VM. It never has an issue.