I have upgraded my internet speed plan from unltd 50 mbps to unltd 400 mbps but my desktop only shows max 100 mbps speed on ookla and on phone it shows between 400-420 mbps. Now the problem my internet guy said my lan is not showing more then 100 mbps. He said to get internal lan pcie adaptor which can support atleast 400 mbps speed or in future if u purchase 1 gb speed also it should support that. so buy such pcie lan card/adaptor. I dont know what that means guys, so can you suggest me which one would be good for long term