DVAlt

The first couple of things I'd try are forcing the dedicated graphics to be used via the Nvidia Control Panel and then making sure that VSync is disabled.

None of those.
If you want the longest lasting thermal paste, use Thermalright TFX.  Several people have tested this on laptops with outstanding results long term.
It can be difficult to spread, so just apply a line across the die (BGA CPU), or two long intersecting X's edge to edge (GPU or IHS covered CPU) and let it spread by pressure.

You're welcome. And I don't think of getting too pricey paste would be worth anyway, no matter how expensive it is the laptop would just run like a stove, as, you know, how inefficient laptop coolers are. The MX-4 I bought is the 'cheapest' one (I bought the last year production batch, kind of 20% cheaper than the new productions one) that got the good reputation here. Heck, it claims to have 8 years shelf time so.. Why not.
 
Rather to save it for the PC.

That is some pretty good temps in my opinion. Thanks for sharing your experience.

I'd say it's good enough for me. Applied it months ago (forgot exactly when) and, kind of constantly running heavy loads (Dota 2 , RDR2 and GTA 5) and I actually never felt it throttling at all, except in some case of RDR2 which I kind of feel some drops (which is expected, laptop's under-powered for the game anyway). Usually idling around 37-42 degrees (on around 27-31 ambient, yeah it's hot af here).
 
I'd say it's kind of better than the paste from the manufacturer before with few degree of difference.
 
Actually using it on a 1500X and 1050Ti system (both re-pasted), I barely bother to check the temps (as it won't even touch 80 anyway, even I OC'ed it by +200 MHz, stock cooler) but it runs fine without any issues.

Reset the CMOS since you are comfortable opening it up. It's a long shot but it might be a voltage issue. 

I'm currently using Logitech G102 and while it's been serving me good, I have big hands and it's a bit too light for me when playing FPS, also I kinda want more buttons on my mice ( ͡° ͜ʖ ͡°)
 
After some thoughts and little hands-on (but haven't try playing with any of them), I come up with 3 choices: G502 HERO, Mamba Elite, and Basilisk.
Based on my little experience, I don't think I'm gonna have problems with the shape of those three, though I'm concerned with G502 due to the amount of buttons that thing have.
 
G502: let me get this first, I *really* love the scroll wheel of this mice and there's nothing quite like it out there (except other Logitech mice lol) and because I'm a lazy-ass person I use a lot of macro buttons/shortcut keys/etc. plus this thing is the cheapest of the bunch makes it hard to pass. But what makes it hard is the software, which could be better in a lot of ways, and the weight of it. I know I said that my G102 is a bit too light to my liking but this thing is so heavy I'm probably in for one helluva learning curve lol.
 
Mamba Elite: I like the ergonomics of this mice, it's got plenty of buttons, and it's got good looks as well (hard to pass on good looks xD) but this being the most expensive of the bunch while me being a cheapskate that I am really discourage me from buying this mice. also the scroll wheel doesn't came close to the G502 lol
 
Basilisk: while it's got the fewest buttons of the bunch, it should be sufficient. it's got something with the scroll wheel but idk how good it is compared to G502 (not even close based on my experience but then again it was just a quick hands-on) and with price tag easier to swallow for me compared to Mamba Elite, it's really hard to pass on this one. I think the learning curve with the weight wouldn't be as drastic as G502. and it might just be my opinion but a successor of this mouse is bound to come out soon since this thing is around 2 yo already (?).
 
My friends have been telling me to stay away from just about all Razer products but judging from what I want it really come down to those three (I was swayed by Steelseries Rival 600 but turne off by the price). Oh and maybe other things that most people don't get is that Razer is not officially operate in my country, well it did but from some sort of 3rd party so there's gotta be a price hike and based on my experience the aftermarket service with them are absolute nightmare comparing on how much money I spend on their products (as a high-schooler that amount hurts)
 
Anyways sorry for the wall of texts I just need some help on deciding which mice to get, or of there's any other good alternatives, I'm all ears! (or rather eyes lol)