It has the Intel Core i7 9750H processor, NVIDIA GeForce RTX 2060 graphics card and 32 gb of memory and I've been getting a decent amount of lag. When I first bought the laptop it ran fine without any lag but has recently started. Beam is the only thing other than Steam I have installed on it.
Clean out the dust from the vents and buy a cooling pad. If that doesn't work, take it apart and reapply thermal paste/do a deeper clean.
Well i have nearly the same laptop. Intel security patches are the problem! There is one tool to deactivate Spectre/Meltdown, but with each windows update our Intel CPU gets slower and slower. Lag is getting more and more. Thats why i prefer AMD now over Intel. Next Laptop will be a ryzen cpu.