It is important that you know that Intel does not support integration. You can check more information by accessing the information in this link: Intel® Wi-Fi Products — Regulatory Information Regarding Hardware Installation or Upgrade
On our best effort to assist you, here are some tips that might help you as well.
1 - Change to a channel that has less interference, you may want to use third-party tools to find out which channel is less crowded. Some users have reported here the usage of inSSIDer, a Wi-Fi analyzer to find out the best channel. There are two versions of this software (Payed and Free) and you are welcome to choose the the best serves your need. For your convenience, here is the link to the free version: inSSIDer 18.104.22.168
2 - Check firewall and antivirus configurations as well as background applications depending on their settings and what they doing, they can also impact as well.
3 - See how many other people are on the network, depending on what they are doing, it may consume bandwidth and the type of game can impact as well.
4 - This link can also clarifies the causes for lagging in online video games: What Causes Lag in Online Video Games? - YouTube
Alternatively, you can use our solutions below to see if they can help you resolving this issue: