First, a bit of a background on this issue. Two identical PC builds. Same parts 100%, running Windows 10. Both are connected to what is supposed to be 1Gbps internet via Cat 8 cables. I'm running an ASRock Z390 Taichi, with the default network card that's built in. To make a long story short, one PC runs 850+ Mbps, the other (mine) runs just 180 Mbps. I'm not on a VPN. Windows Tuning is disabled. I made sure bandwidth restrictions were not active. The network adapter still says 1.0 Gbps but I am getting nowhere trying to pinpoint what is causing this. I've uninstalled anything that could be throttling via software. I need suggestions and help to get this fixed. Thanks in advance.