I haven't really used windows bridging, when I have messed with it it hasn't even worked.I wasted close to 3-4 days trying to make this motherboard work as a router + switch through windows/plex.
However you can use linux or BSD (pfsense/opnsense) bridging. And it's... okay. not as good as a real switch but ok. Depending on CPU you should be able to get between like 1gig and 4+ gig speed.