My download is 4mb and upload 512kb.
When someone is doing upload via my router, it fills all the pipe which I understand from my question's answer here. This causes my ping very high, unable to gaming and surfing.
Since my router has no traffic control feature but it has QoS. After googling, I can't find any guide how to setup QoS to give priority to my game protocol.
Here is the qos pages.