Hi, I have a SuperMicro C7Z97-MF motherboard with an onboard Intel i210 network adapter. This computer is on a 1 Gbps internet connnection. The problem is on Windows 10 I will get around 950~ Mbps download speeds from pretty much any location, but when it comes to upload speeds the performance seems to seriously degrade as latency rises. With only 45 latency the maximum upload speed seems to be about 35 Mbps.
This issue does not occur when I tested with a live Ubuntu CD. With Ubuntu the download and upload was over 900 Mbps to any location.
On Windows 10 I have tried using the network adapter driver from the SuperMicro website for that particular board and I have also tried many other variations of newer and older Intel PROSet versions. I tried tweaking pretty much every option in the network adapter settings as well as tweaking every option in the TCP Optimizer tool. Nothing seems to get the upload speed up to its proper speed.
Something I did notice was when I tried setting the Link Speed to 100 Mbps Half Duplex the upload speed went up from 35 Mbps to about 75 Mbps to the specific server I was testing against. Obviously I want 1 Gbps Full Duplex though as 100 Mbps won't do.
Does anyone have any suggestions on what this issue could possibly be? I've been trying to figure it out for well over 2 months now and haven't gotten anywhere.