Random BSOD with different error codes on ASUS UX303UB

All the dumps I looked at indicate memory_corruption_large. This can be RAM, other hardware or a driver problem.

You're running mixed memory which is know to cause weird problems like this. Remove the 4GB module and run with just the 8GB module. Re-seat it to make sure it's firmly inserted and seated. See if that helps. If it does get another 8GB the same as the one you have or replace both with an identical pair.

All the memory should have been matching is that is how it came from the factory.

This is what the dump shows:

Code:

[Memory Device (Type 17) - Length 40 - Handle 0013h]
  Physical Memory Array Handle  0012h
  Memory Error Info Handle      [Not Provided]
  Total Width                   64 bits
  Data Width                    64 bits
  Size                          4096MB
  Form Factor                   0dh - SODIMM
  Device Set                    [None]
  Device Locator                ChannelA-DIMM0
  Bank Locator                  BANK 0
  Memory Type                   18h - Specification Reserved
  Type Detail                   0080h - Synchronous
  Speed                         1600MHz
  Manufacturer                  SK Hynix
  Serial Number                         
  Asset Tag Number                        
  Part Number                   HMT451S6BFR8A-PB  
[Memory Device (Type 17) - Length 40 - Handle 0014h]
  Physical Memory Array Handle  0012h
  Memory Error Info Handle      [Not Provided]
  Total Width                   64 bits
  Data Width                    64 bits
  Size                          8192MB
  Form Factor                   0dh - SODIMM
  Device Set                    [None]
  Device Locator                ChannelB-DIMM0
  Bank Locator                  BANK 2
  Memory Type                   18h - Specification Reserved
  Type Detail                   0080h - Synchronous
  Speed                         1600MHz
  Manufacturer                  Samsung
  Serial Number                         
  Asset Tag Number                        
  Part Number                   M471B1G73EB0-YK0 

Adding or removing memory will not void the warranty. If it was my laptop, I'd replace the 4GB memory modulr with another 8GB module identical to the one already installed. For the time being, just remove the $GB module and see if that helps. It may not but it's an easy test to make.

If it doesn't help then I suggest enabling Driver Verifier and see if that shows us anything.

===================================================
Driver Verifier is a diagnostic tool built into Windows 10, it is designed to verify both native Microsoft drivers and third party drivers. Driver Verifier's verification process involves putting heavy stress on drivers with the intention of making bad, outdated, incompatible or misbehaving drivers fail. The required result is a BSOD (Blue Screen of Death) which will generate a crash dump for debugging purposes.
Machines exposed to Driver Verifier will run very sluggishly due to the stress being applied to the drivers.

Driver Verifier - Enable and Disable in Windows 10

Pay close attention to
PART TWO
and make sure the correct boxes are checked.

Warning:
It is not advised to run Driver Verifier for more than 48 hours at a time. Disable Driver Verifier after 48 hours or after receiving a BSOD, whichever happens soonest.

Always create a Restore Point prior to enabling Driver Verifier.

What we're looking for is a BSOD with a mini dump that will tell us what driver caused it.