What is the cause of the blue screen of death?

Question

Windows

Good day. So, I installed Windows 7 for myself, after twenty minutes of playing any game, the blue screen of death crashes. Here is the minidump analysis:

This was probably caused by the following module: ntoskrnl.exe (nt+0x748C0)
Bugcheck code: 0x50 (0xFFFFF6FB48000210, 0x0, 0xFFFFF800030BBF0B, 0x2)
Error: PAGE_FAULT_IN_NONPAGED_AREA
file path: C:\Windows\system32\ntoskrnl.exe

This is the first screen, the second one is:

This was probably caused by the following module: ntoskrnl.exe (nt+0x748C0)
Bugcheck code: 0x3B (0xC0000005, 0xFFFFF800033A2F20, 0xFFFFF8800BB5EBE0, 0x0)
Error: SYSTEM_SERVICE_EXCEPTION
file path: C:\Windows\system32\ntoskrnl.exe

I can lay out the dumps themselves, if you explain where to upload them.
RAM was checked for errors in memtest 86 - no errors. The hard drive was checked by Victoria (or something like that) - there are no bad blocks. Gigabyte GTX 970 graphics card with latest drivers. Motherboard ASRock z170 Pro4. Temperatures above 38 degrees do not rise even in the game itself, the cooling of the processor and case is excellent.
Before that, there was Windows 10 and blue screens also flew out, only with the problem of ntfs.sys.
What could be the problem?

Answer 1

memtest to help you get started.