The archer c7 (no h/w revision of it) doesn't have hardware flow-offloading (that's only supported by mediatek mt7621/ mt7622 so far), so enabling it won't do anything (-good). The hardware itself is good for ~175-200 MBit/s (at most), software flow-offloading can push that a bit, but you're really looking for (way-) faster hardware with a 500 MBit/s WAN speed, see So you have 500Mbps-1Gbps fiber and need a router READ THIS FIRST.
2 Likes