Gigabit LAN remains capped at 140mbs within the sandbox VM environment.
Gigabit LAN remains capped at 140mbs within the sandbox VM environment.
I have a gigabit connection (940mb day1, 700mb tested today on my laptop port). My motherboard is an MSI Z170 Gaming M5, the LAN port uses an E2400 Atheros chipset, and I’m using a Cat6 cable with a Gigabit switch. It always works fine. Recently, I noticed the connection isn’t performing as expected. My speed test came back at 140mb. I tried updating drivers, cleaning them, and reinstalling from scratch, but nothing helped. I suspected the LAN port might be faulty since I tested the same configuration with the same cable and still got 700mb. Then I ordered a USB 3.0 to Gigabit adapter from Amazon Basics, and the results matched. Next, I tried running a Windows 10 1903 sandbox VM, and it achieved over 400mb. The Hyper-V virtual Ethernet adapter inside the sandbox worked well. Both the E2400 and the USB adapter support 1gb links, with auto-negotiation enabled by default. IPv6 isn’t the issue. I haven’t found any program restricting bandwidth. The only problem was Killer Device Center, which I uninstalled. I’m stuck and really don’t want to restart Windows 10. It’s a frustrating situation. The cable seems fine because I can get speeds above 700mb on another laptop. I’ve reset netsh and tried various fixes, but nothing changed. The speed inside the VM is consistently high (450+), while outside it drops to around 145. Running in safe mode still shows 145. QoS limiter isn’t the cause—it only slightly improved ping by a few milliseconds. I don’t want to risk damaging the OS.
On the PC, a Google Drive file was downloading at 2 MB/s while the VM processed at 50 MB/s. The laptop was handling 60 MB/s.
Verified the interface details in Network Connections. The speed is listed as 1Gbps or 100Mbps.
I'm sorry, your message was quite lengthy. It would be easier to follow if we broke it into key points. Using a local transfer might add more confusion if it doesn't work.
They want to link the PC and the laptop using a cable, but they're unsure about setting up local transfers. This is their first time doing it.
It's simple: connect your PC, go to C:\, select Sharing, enable Advanced Sharing, choose this folder, click Share, adjust permissions, grant full control, apply changes, run ipconfig to note the IP, access the shared drive via File Explorer, test read/write speeds up to 115MB/s, consider placing the drive on the laptop for better performance, and reverse the process to remove sharing when needed.
It's focused on internet-based traffic. That's a unique angle. It seems like the connection speed is being restricted by something specific on the host side, while virtual machines remain unaffected. I'm unsure what direction to take next.