Hi Reinkaoswolf.

firstable, good Job on trying to fix the Issue on your own. that would be my Suggestions otherwise.

would you check the Windows Reliability History next? open Start Menu and type "Reliability", then pick Show Reliability History from the List. can you see any Errors?

Hi, 

Did you use the video driver from the Dell support site? Are you running the games while the system is plugged in to the AC adapter or are you running it only on battery? 

Thank you for answering! Yes! I always have my system plugged in when I play games. When I did a clean reinstall of the Nvidia driver, I used a program called Display Driver Uninstaller or  something like that then I've download the driver from the Nvidia website. Thank you!

Thank you for answering! Here are some screens and errors started. 

07/07/2017

08/07/2017

11/07/2017

12/07/2017

and for today 13/07/2017

Thank you!

I've noticed in GPU-z that the bus interface for my GTX 1080 is at x8.3.0. My card should be running at x16 but instead is only going at x8.3.0 (SLOWER than normal).  Also same thing shows in Nvidia Control Panel.  So, any problems here ? Or is it just normal ? PS: Sorry about my english!

yep. exactly what i expected. uninstall Tobii Eye Tracking Software and run the Games again. then see if it runs better.

I'm thinking of repaste or ask for a motherboard replacement -__-. Last night in WoW: Legion had a lot of stuttering.

This didn't fixed the problem. It's happening again! Right now, I'm playing Rise of the Tomb Raider and the game freezes 4 to 5 times now every minute.

i saw someone having the same Issues and he fixed it after removing Tobii Software. too bad it didn't work.
about your Questions:
re-paste wouldn't work. your Temps are fine. they are actually too good to be true.
your GPU is running at PCIe x 8 and it's normal for the Laptop.

your BSOD can be everything from Software to Hardware Error. all your Errors in the Reliability History make no Sence. they are Random and probably just a follow up Errors. replacing the Motherboard might help but i'm not sure if Hardware Error is the actual Source for your Problems.

on 12.07.2017 you have two Windows > Hardware Errors in the History. could you Please Double Click on them and Post the Text?

1st error

description
A problem with your hardware caused Windows to stop working correctly.

Problem signature
Problem Event Name: LiveKernelEvent
Code: 144
Parameter 1: 3003
Parameter 2: ffff8001065fa7b8
Parameter 3: 40010000
Parameter 4: 0
OS version: 10_0_15063
Service Pack: 0_0
Product: 768_1
OS Version: 10.0.15063.2.0.0.768.101
Locale ID: 2057

Extra information about the problem
Bucket ID: LKD_0x144_USBHUB3_DEVICE_ENUMERATION_FAILURE_UsbHub3!TelemetryData_CreateReport_VEN_0000_DEV_0000_REV_0000
Server information: e8e7c41c-8ff8-4573-ba42-bd261085580f

2nd error

Description
A problem with your hardware caused Windows to stop working correctly.

Problem signature
Problem Event Name: LiveKernelEvent
Code: 1a1
Parameter 1: ffff988672cd7040
Parameter 2: 0
Parameter 3: 0
Parameter 4: 0
OS version: 10_0_15063
Service Pack: 0_0
Product: 768_1
OS Version: 10.0.15063.2.0.0.768.101
Locale ID: 2057

Extra information about the problem
Bucket ID: LKD_0x1A1_WIN32K_CALLOUT_WATCHDOG_nt!IopLiveDumpEndMirroringCallback

and another today lol 14/07/2017

Description
Faulting Application Path: C:\Windows\System32\DriverStore\FileRepository\ki121509.inf_amd64_cf0568c384a72b13\IntelCpHDCPSvc.exe

Problem signature
Problem Event Name: APPCRASH
Application Name: IntelCpHDCPSvc.exe
Application Version: 1.0.0.1
Application Timestamp: 58c1a0e4
Fault Module Name: IntelCpHDCPSvc.exe
Fault Module Version: 1.0.0.1
Fault Module Timestamp: 58c1a0e4
Exception Code: c0000005
Exception Offset: 000000000000355f
OS Version: 10.0.15063.2.0.0.768.101
Locale ID: 2057
Additional Information 1: 3e4f
Additional Information 2: 3e4f146dec0c5d964b43d3f4fb157be9
Additional Information 3: 64b9
Additional Information 4: 64b9c1f102f1c398a7ffe6c30b7b2448

Extra information about the problem
Bucket ID: 3a9b2af14e3485ee4ffa0957d1e2c278 (120715021886)

is the latest Intel HD Graphics Driver installed?

i found a Thread on the MS Forum. the Guy got Code 144 aswell.

Getting error message LiveKernelEvent with error code 144 - Microsoft Community 

try to run the Troubleshooter as explained in the Link.

Ok, thank you for confirming this. Send me your Service Tag in a PM so we can look further into this. 

I have the same issue, received my computer yesterday. Have you managed to fix the issue ? If yes how please ?

How long is each freeze?

I had a very simliar issue with my 17 when using an external monitor.  I went into the Nvida Control Panel and made a few adjustments to the 3D Settings which helped a lot.  The first thing i did was set Vertical Sync to Fast which got rid of the FPS issues whenever I would access in game Menus or the inventory screen in Witcher 3.

I'm still having issues whenever a game switches to a cut scene though.  No matter what game it is, it will stutter for 1-2 seconds at the beginning of every cut scene.