@Tony tried updating firmware via download from website as you suggested. This did not help. I guess I'll be contacting support. Thanks for the suggestions.

@Tony Ok. Tried swapping Cat7 cables with Cat5e cables and there was no major difference (Cat5e was a little slower actually, which is to be expected). As stated in my original post, the router is...

I just upgraded my internet from 100/10Mbps to 400/20Mbps. I've connected my PC to the modem directly and I can get 400+Mbps consistently, which is great. However, when I route the ethernet...