I have Intel HD Graphics 5500, i7 5th generation, 16gb RAM. Before I had stable Fps but few days ago, I started getting very low fps drastically out of nowhere. So maybe someone could help me.
P.S. I saw a very similar problem but maybe this changes for me, in anyway, I will attach a file that worked for that other guy.
We need more information. Please download and run the Intel System Support Utility for Windows. Select all data categories, generate the report and then have the tool Save the report to a text file. Don't try to use the Submit capability; it doesn't work. Finally, using the Drag and drop here or browse files to attach dialog below the edit box for the body of your response post, upload and attach this file to the response post.
From what I can see, you are using an older graphics driver. The latest for Intel HD Graphics 5500 is version 22.214.171.12471. You can download this driver from here: https://downloadcenter.intel.com/download/30196/Intel-Graphics-Driver-for-Windows-15-40-.
Hope this helps,