if it works w shield, i doubt it will be a win or network problem. do u use smb or nfs? z9s works well w smb but had problem w nfs. I dont know its the same on z9x but might be worth checking. I often played media on the pc w my z9s (via gigabit ethernet). has no problem with 4k60Hz (90-100 mbps). mind you, if there are other background activities on the pc, it might cause stutters. so i usually just log off any user sessions b4 starting video.