Seeking help to find the right sensitivity for my new setup. Thanks!

[mythicone]

I used to play CS:GO on my old laptop with a screen resolution of 1024x768, stretched in a 4:3 aspect ratio. The laptop was 15.6 inches, with a native resolution of 1366x768, and my sensitivity was set at 1.7 with 800 DPI. Now, I've switched to a new laptop with a larger 17.3-inch screen, and the native resolution is 2560x1440 in a 16:9 aspect ratio. Although my CS:GO sensitivity is still 1.7 with 800 DPI on the new laptop, it feels different. If anyone can help me find the correct sensitivity for the new setup, I would greatly appreciate it.