Btw for those that are curious what was the server change.
Old machine:- Home server, just a typical budget PC
- Intel Celeron G530 @ 2.4 Ghz (2 Cores, 2 Threads)
- 4GB of memory
- 320GB SATA HDD
Networking:
- 8 Mbit Upload
- Cisco EPC3008 cable modem + Linksys Router WRT160Nv2
New machine:- A dedicated server in data center
- Intel i7-930 @ 2.8 Ghz (4 Cores, 8 Threads)
- 24GB of memory
- 2 TB SATA HDD
Networking:
- 100 Mbit
Should explain why there were problems in the beginning when like 300 people started downloading cache
Personally I was very surprised that the game was even playable with more than 400 on board.
Also old setup had 100% CPU load frequenty. If someone had problems with lags, they should be gone now.