Underperforming Clevo P870DM-G?

Specs:

• i7 6700K
• GTX 980m x2 in SLI
• 32GB DDR4 RAM

Hey all, recently I've been having troubles with poor framerate in multiple games: Rocket League, Rise of the Tomb Raider...etc. I've been having a consistent 75 frames with G-Sync before, but now all of my games have dropped down to around 30-40. I reset all my Nvidia Control Panel configurations, but that did not help. Only when I disabled G-Sync had I seen a significant improvement in framerate, but it is now plagued...

Underperforming Clevo P870DM-G?