Just upgraded to 400mbps internet. All devices in the house receive 400mbps, whereas my PC with killer e2400 and ethernet caps out at 200mbps. Have tried different cables, redownloading drivers and bios and flushing dns. What is bizarre is that my pc recieves the same upload speed as other devices (50mbps), but precisely half the download speed. Contacted my ISP and it is evident that the problem lies with the network adapter. All software and drivers are up to date. Motherboard is MSI Z170A gaming m5 and I am on windows 10 64. Any thoughts??