You need a hub that can deliver up to 3A per USB port without 'being asked' (unlike most hubs which wait for USB-protocol messages from the device to tell it what current they are rated at). That's why the GekkoScience hub is the preferred choice by most Compac F owners.
Thank you, besides the GekkoScience hub any others you recommend? I'm looking for something that can power up to 10 hubs if possible.
Unfortunately, I think right now GekkoScience is the only way to go. I looked a lot (and tried some) and nothing worked well enough. Even hubs traditionally known for mining sticks such as
this type probably won't suffice, because so far stick miners pulled way less current.
This high current requirement is kind of new, since the Compac F to my knowledge is the first one to pull almost 3A or 15W from one port. I think this is even outside of official USB spec; hence any non-mining-specific products won't really cut it.
Nonetheless, it seems the person who recently found a block with these, runs 3 miners on a single
BitcoinMerch 10 port hub. Keep in mind this only delivers 120W, so 12W per port or 2.4A, which is still within USB spec. However you won't get the F's full potential if you limit it to 2.4 Amps.
I actually had the 4port version of the hub from
this kit and it didn't work well, even though it should have been able to deliver 2.4A to at least one port. So I'm not saying the 7-port version will not work, just to be careful. It uses BC 1.2 spec to deliver 2.4A, just as the 7-port version; and from my knowledge in BC 1.2 the device needs to 'ask' the hub for the full wattage (which mining sticks don't do).
It seems if you want to use one of the typical 2.4A hubs, you will not be able to put more than half the amount of theoretical maximum devices into it due to power limitations. What I mean: often the hubs are advertised as: "2.4A 10-port hub" but only come with e.g. a 20W power supply. In that case, you would only be able to power a single of those 10 ports with 2.4A.
Meanwhile, I believe you can put 7 Compac F's into the GekkoScience hub (but you need of course around 100W PSU - hub comes without one).
Otherwise I'm not sure why @Sledge0001 chose not to put all 9 miners into a single hub. I mean in theory its 120W should suffice.