Why internet slows down 100x after UE5 starts

For some reason on win 11 after I launch UE5 my internet slows down 100x from 1Gbit to 7mbit.
It’s still kind of usable but super slow. I notice it after it connects to any unreal online services, that’s when it usually happens.

Anyone else having that issue?

Hey there @bchayka! Welcome to the community! It’s possible there could be some large network resources being used if connections are failing for some reason and trying to reconnect repeatedly. If possible, I’d recommend taking a look at the Windows Resource Monitor (you can open this by typing Resmon in windows search) and seeing if any of these standard processes are having larger issues.

In my example, these processes ended up only using at maximum 1 Mbps.

Noticing a lot traffic in the beginning (7 million B/s), then it slows down (1,300 B/s) when I’m down to 10mbit. Maybe some throtteling going on somewhere with windows?

Not sure what would be throttling network traffic. One case where a developer’s network speeds were being throttled was using a program called “Lenovo Boost”, your computer may also have a similar program causing it. There have also been reports of the software “Exit Lag” causing a similar issue, but that wasn’t replicable.

Are the Unreal processes still maxing out after the throttling?

Interesting, I have a lenovo legion right now. Literally the moment I close unreal the internet goes back up. That’s crazy. I’ll try on my other windows device and see if it does the same or if it’s something device specific.

I closed all lenovo services, nothing worked, until I closed UE5.

Following things I did and I think it helped, internet doesn’t drop anymore:

  1. I restored all defaults with windows defender and firewall settings
  2. I closed all lenovo services
  3. I closed all UE5 services via task manager and then closed UE5.
  4. After launching UE5, windows asked me to allow the Zen server services and another one, I allowed both.

Now it seems to run stable. I keep you posted!

1 Like