Lags

[Lonsofore]

Hello Killtube. I have a problem and as you guessed, with lags.
This thread isn't like "help me, everything broke". And let me explain why:
1. I tested my connection with cmd and ping - it's ok, stable. But in game it can be higher and unstable. In cmd it's like (for me) 105-115 (it's ok), in game it's like 120-160.
2. This lags depend on players count. With 10 players it's ok, but with 20 we have lags
3. I have enough RAM and CPU. It isn't overloaded more than 70% (by the way, on map restart one of two CPU is 100% - is it ok?)
I don't know, can it tells you something, but I attached here some images of my lagometer.
So, I need some opinions about it - where can I look at to find a solution?