Hello everyone!
I am pretty sure I know where my problem comes from but I would like to get more people opinion because thinking you know the answer and being right is 2 different things!
So here is the thing, I am running a P57X v6 (gaming laptop) that is supposed to run Nvidia Optimus (Gigabyte's support told me this info, I don't know where to look to know it -_-) and, using the mini-DP, I got an external monitor (Asus VG248EQ) to run games at 144 Hz.
So here is the thing: whenever I want to run UFO test I am seeing it capped at 60 fps until I launch a game and then see it capped at 144 Hz.
As I said I thing I know the problem: considering the laptop uses Optimus technology (please tell me where to find proof of that on my machine), whenever only the webpage of UFO Test is open, only the iGPU, capped at 60 Hz, is used (iGPU is the integrated graphics of Intel's CPU, I precise for anyone without experience looking to solve a problem similar to the one I am describing ?) but when a game is opened Optimus switch over to the dGPU (dedicated GPU, a GTX 1070 in my case, non max-Q mobile variant) which obviously goes above the 60 Hz and I can then see UFO Test reach 144 Hz.
Please tell me if I am thinking this right and please don't hate my monitor, I got it for nearly 100$ as refurbished, I wouldn't recommend it at any higher price, colors suck!
Also if you get a chance to recommend me a monitor upgrade it's actually what I plan to invest next (the tower will come after I don't need to bring a powerful computer for 3D rendering at school). I don't know if my GPU could push 2K (1440p) at something such as 144 Hz (or even 60 Hz for that matter) I lack experience in anything exceeding 1080p.
BONUS:
I got no clue why it does it but whenever I close my computer lid UFO Test goes back to being capped at 60 Hz and I don't know any tool to see if games does the same since I can sometime see 200 FPS (which obviously is impossible to display, I just assume it's what the game is pushing)