I'm running into folk that expect solid unchanging frame rates but that's not how it works today unless you go total overkill on the CPU and GPU. Example? 1080 Ti GPU with plain 1080p 60Hz display and current i7 CPU plus the other good parts.
Panning around is the most stressful and FPS should take a drop as the CPU and GPU get to work on the new scene. I've seen 2000 buck desktops drop frame rate on panning. The only time I didn't see this was on the plain rig I noted above and even then FPS did drop but not below 60 so all was OK in my view.
I recently bought a MSI GS65 Stealth Thin Laptop with an Intel i7 8750H, 16 GB of Ram and a Geforce 1070 maxq.
Due to overheating issues I undervoltet the CPU Core and Cache to recommended -0.125V.
My problem is, when I play GTA 5 (on High settings)I get constant Frame drops especially when I look around fastly or when I'm flying low.
Are the settings set too high and my 2000$ Laptop can't handle it? I really thought I can even play GTA 5 on very high settings, but obviously not.
Is it because of my (minor) undervolting? Any tips maybe?
Thanks!

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic