GT70-0ND nvlddmkm.sys BSOD error

Question

Hello Everyone.
the last months or so i started getting random BSOD all pointing to nvlddmkm.sys
i got in touch with nvidia to help me solve the problem.
the things i tried:
1) changing registry: add TdrDelay and TdrLevel (per nvidia tech department)
2) clean install of several different versions of nvidia graphics drivers (note i also used Driver-Fusion to clean up registry after each uninstall)
3) Full-system scan for Malware, Virus etc - using several programs, such as: AVG, MalwareByte.... - all returned clean reports.
lastly i tried running "Windows Memory Diagnostic Tool" and Memtest86+.
now both discovered errors!!
Memtest86 was able to complete a full pass with no crashes
but Windows tool crashed twice, once just as i started testing and once just at the beginning of the second pass.
Pictures of the Errors:
Memtest86 after 1 pass:
Windows Memory Diagnostic Tool - Stuck.
now i wanna test out which RAM module is at fault, by removing them all and inserting them one by one for testing.
the problem im currently having is as follows:
as u open up the laptop cover from the bottom, u can immediately see 2 RAM modules sitting near the CPU & GPU.
but my system has 4 RAM sticks. the other 2 i cannot locate.
if u guys know, could you please tell me where can i locate them and how to remove them?
i rather not disassemble the entire thing.
just in case you wonder, i checked youtube and google for instructions on how exactly to do this.
but all the guides i found only mention the 2 RAM modules i already know about and not the other 2.
Thanks in Advance.
Edit:
forgot to add system specs:
CPU: i7-3630QM
GPU Geforce GTX 675MX 4GB
Memory: 16GB DDR3 1600Mhz (4x4GB)
SSD: 120GB Patriot Pyro SE
HDD: 750GB WesternDigital 7200rpm
OS: Windows 7-64bit
side-note: system came pre-installed with windows 8 + appropriate UEFI Bios.
as soon as i got the system i formatted it and installed Windows 7-64bit. - switched Bios to LEGACY mode.

Answer 1

i also dont live in the USA, luckily mine is still within the 1 year global warranty.
i actually got this laptop as an RMA replacement because of MSI :censored:up.
i had the GT783R, the graphics card went bad just 1 month after the 1 year global warranty expired. had to send all the way to the USA to fix it (still a better option than buying a new laptop or a replacement graphics card - which almost none sell it.)
well, they replaced my GTX 580M 2GB with a GTX 670M 3GB, calling the 670M "better" than the 580M. if you know your graphics card, a little check up on google can tell u that no! its not better. the 670M is almost equal in performance to the 570M.
anyways after several calls to their tech support and speaking with a manager they agreed to take back my GT783R with them covering shipping expenses and giving me a new laptop, the GT70, in its stead.
luckily for me, Laptop warranty goes according to laptop serial number, meaning my GT70 is still under the 1 year global warranty.
so i can fix it in my own country.
why am i telling you all this?
because prior to sending my GT783R to the USA, i spent almost 2 months troubleshooting the problem and trying to solve it. so im trying to save u some time and headache.
i even tried contacting nvidia tech support to help me solve the problem
eventually the problem wouldnt go away and i had wasted 2 months without a laptop for nothing.
so basically if you run the following tests and everything is fine it most likely the graphics card and it needs to be replaced.
first you can make sure your laptop isnt full of dust inside and the vents arent clogged.  then try these:
1) running memtest (several passes) with no errors
2) formatting the laptop to rule out software issues
3) testing several nvidia drivers (the ones the came with the laptop and the latest Stable nvidia release)
4) (nvidia tech rep suggestion) Open NVIDIA Control Panel --> Manage 3D settings.
    Go to Program Settings tab.
    In the setting window, change the ‘Power Management Mode’ to ‘Prefer Maximum Performance’.
5) (nvidia tech rep suggestion)  Please try this registry fix and observe the computer performance.
     a) Go to the Registry Editor (Press Windows Logo + R and type "regedit" in the Run window and click ok)
     b) Navigate to HKEY_LOCAL_MACHINE - > System -> CurrentControlSet -> Control -> GraphicsDrivers (make sure Graphics Drivers is highlighted).
     c) Right click -> New -> DWORD (32-bit) value -> Name it: TdrDelay -> double click it -> Set it to A (hexadecimal) or 10 (decimal).
     If that doesn't work, try disabling it, by adding the following DWORD: TdrLevel and setting the value to 0, then rebooting.
6) updating BIOS to latest version.
****obviously im not responsible for anything that happens to your laptop and you are trying the stuff i mentioned at your own risk.*****
btw, if your laptop suddenly doesnt even recognize your Graphics card i think its toast.
no point wasting time, send it RMA if u can.
Good Luck.