This is not meant as a complaint as I already have resolved my issue but wanted to spark a discussion.


I am located in Bulgaria (Eastern Europe) and in the country and especially I have very good speed and bandwidth (with the current ISP).

For some reason for several months most of the time my download speed of games was limited to 2.4 MB while I am able to download between 15-16 MB (sometimes simultaneously while downloading a game).

I tried a lot of things here are some of them:

Only using cable 1 gigabit connection.
Reinstalling the steam app and the games
Making sure there is no limitation in the speed or bandwidth in Steam settings
Changed Download region (will come back to that)
cleared Steam download Cache
Disabled Throttling
Checked ports used by steam that they are free and not blocked.
Checked HDD and CPU usage (both were low)
Checked Windows 10 firewall
Updated drivers
Temporarily disabled windows 10 firewall
Checked with ISP
Changed download location (different disk)
Flushed DNS and Changed DNS Servers to public one
Changed Speed & Duplex from "Auto Negotiation" to the highest available "Full Duplex"
Checked Quality of Service (QoS) settings in the router (I have them but they were not active)

There were some other suggestions about settings for drivers and steam.
In the end nothin helped.

After a Month I tried digging again but did not found many new suggestions. Since I had time on my hand I started switching Steam servers.
I think I tried most of the servers in Europe (there are quite a few) with the same result.

In the end I switched to one of the Indian Steam servers and I was downloading with 16 MB/s.
If it was a DNS issue releasing the DNS should have resolved it.

I don't think that there is any throttling done by Steam.