The Archer A7 v5 has a single-core mips 74Kc based QCA9563 SOC, running at a clockspeed of 750 MHz. The performance of this 750 MHz (mips 74Kc router-) CPU is good for around 200 MBit/s (give or take) WAN-LAN routing/ NAT in software, it's utterly insufficient to handle 1 GBit/s WAN speeds.