If you recall reddits growth many of their communities evolved as offshoots of a single generic community. This made it easier for people to see discussions they normally would not get involved in, and once the posts in a similar category reached critical mass it moved to a sub Reddit.
I think people are recreating their niche communities here but they are floundering since the user base is still pretty small. Maybe it’s best to post to the “big” communities until the time is right to move to smaller, targeted communities?
You might go with PC hardware. Just “hardware” could refer also to nuts, screws, and door hinges.
No one will type pchardware. But we could have added links to other non-IT magazines.
But on searches, if they type hardware, PCHardware will pop up because it has hardware in it.