WiFi is dead in my bedroom (1 bar on PC), causing bad ping spikes and Discord lag. I’m installing my motherboard’s WiFi antenna today. If that fails, will placing a WiFi 6 extender halfway and running Ethernet to my PC actually help, or am I just cabling bad WiFi?
You haven’t connected the antenna? My brother in Christ, install the two pieces of hardware whose entire job is receiving WiFi before shopping for another box 
@No_Chart Antenna helped a bit (PC went from unusable to decent), but the bedroom signal is still weak on both my phone and PC. So the antenna fixed part of the issue, but it’s not the whole solution.
A cable from the extender to your PC doesn’t magically make the connection wired. The extender still has to talk back to the router over WiFi, so that wireless hop is still your bottleneck. Repeaters can work, but I wouldn’t make one Plan A. If you can run Ethernet to an actual AP, do that. MoCA can also be worth looking at if you’ve already got coax in the house.
First things first: map out your signal with NetSpot to see where it actually craps out. Walk from the living room to the bedroom. You need to find a solid middle ground for an extender, because if you stick it right in the dead zone, it’ll just enthusiastically blast a garbage signal. You get how it works, right? If the extender itself can’t catch a decent signal from the router, it has absolutely nothing to work with. It’s not magic — it can’t boost a signal that isn’t there, so you’ll just end up with full bars of totally unusable, lagging internet.
@Skeptical.pragmatist Wait… wow, thanks, I honestly didn’t know it worked like that. I always thought you were supposed to put the extender where the signal is already terrible so it “fixes” it there.
Yep, if you have to use a repeater, that’s the general idea. Put it where it still has a solid connection to the router. Honestly though, repeaters are kind of a meh solution — I don’t really get why people love using them…