Recently, I have upgraded my PC and ever since, I have been having game disconnection after 5-6 hours, due to G-sync being disabled after a while, and its been really frustrating, especially if you have multiple characters.
PC Specs:
Operating System: Windows 10 Pro 64-bit (10.0, Build 17763) (17763.rs5_release.180914-1434)
Language: English (Regional Setting: English)
System Manufacturer: System manufacturer
System Model: System Product Name
BIOS: 1302 (type: UEFI)
Processor: Intel(R) Core(TM) i9-9900K CPU @ 3.60GHz (16 CPUs), ~3.6GHz
Memory: 32768MB RAM
Available OS Memory: 32684MB RAM
Page File: 8209MB used, 26521MB available
Windows Dir: C:\Windows
DirectX Version: DirectX 12
Card name: NVIDIA GeForce RTX 2080 Ti
Current Mode: 2560 x 1440 (32 bit) (59Hz)
Native Mode: 2560 x 1440(p) (59.951Hz)
Output Type: Displayport External
I have done the following without being able solve the issue:
PC Power settings been changed to maximum performance
G-sync has been disabled
G-sync performance switched to maximum performance
Updated GPU Driver
I am using a DP port with 2560x1440 resolution and 60hz (Asus PG279Q)
Appreciate your support in advance, do you think if I switch to HDMI cable, it will be fixed?

The above photo is the message i get