Welcome Asif Shaikh,
Thanks for the detailed write-up, it saves a lot of back-and-forth. Here are quick answers to your questions:
- Driver or hardware? Right now it looks more like a driver problem. LiveKernelEvent 141 means the GPU stopped responding and Windows reset the driver. 1B8 is a black-screen log. Neither one proves the hardware is bad.
- Hybrid graphics? Possibly. On this laptop the NVIDIA GPU sends its frames through the AMD integrated GPU, so the AMD driver can be involved too.
- GPU, VRAM, board or power? The GPU and VRAM are soldered to the board, so software can't fully tell them apart. The steps below should narrow it down.
Could you confirm the questions below:
- Did the crashes start after you moved to this Insider build?
- Does it happen in every game or just one?
- Are you always on the original Lenovo charger when it crashes?
In the meantime, try these:
- Use Lenovo's drivers. Install the NVIDIA and AMD graphics drivers from Lenovo Support for the 15ACH6 instead of the generic NVIDIA driver. Lenovo's versions are tuned for this laptop's hybrid setup.
- Test your RAM. The 0x50 crash can be caused by faulty system memory, and OCCT's VRAM test only checks GPU memory. Press Win + R, type mdsched.exe, and choose "Restart now and check for problems".
- Turn off PCIe power saving. Go to Control Panel > Power Options > Change plan settings > Change advanced power settings > PCI Express > Link State Power Management and set it to Off
If it still crashes with Lenovo's drivers and the RAM test passes, contact Lenovo for a hardware check.
Note: The Lenovo link is a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as PUPs (Potentially Unwanted Products). Thoroughly research any product advertised on the site before you decide to download and install it.
Looking forward to your update.