BSOD At random moments (involving ntoskrnl.exe & ntkrnlmp.exe) etc.

i'm having inumerous BSOD problems with my pc, i tryed to format, change the OS and didn't help. before the format, it happened every time, 30 mins iddle with everything closed and "BSOD" ! then, after the format, i've just got the BSOD sometimes, opening games generally (CSGO and PayDay 2, the last times)
if someone can help me, i'm new in the forum.
here's the "Who'sCrashed" results:

On Wed 15/01/2014 01:49:34 GMT your computer crashed
crash dump file: C:\Windows\Minidump\011414-26145-01.dmp
This was probably caused by the following module: ntoskrnl.exe (nt+0x75BC0)
Bugcheck code: 0xA (0x8, 0x2, 0x0, 0xFFFFF80002F8376B)
Error: IRQL_NOT_LESS_OR_EQUAL
file path: C:\Windows\system32\ntoskrnl.exe
product: Microsoft® Windows® Operating System
company: Microsoft Corporation
description: NT Kernel & System
Bug check description: This indicates that Microsoft Windows or a kernel-mode driver accessed paged memory at DISPATCH_LEVEL or above.
This appears to be a typical software driver bug and is not likely to be caused by a hardware problem.
The crash took place in the Windows kernel. Possibly this problem is caused by another driver that cannot be identified at this time.



On Wed 15/01/2014 01:49:34 GMT your computer crashed
crash dump file: C:\Windows\memory.dmp
This was probably caused by the following module: ntkrnlmp.exe (nt!KeBugCheckEx+0x0)
Bugcheck code: 0xA (0x8, 0x2, 0x0, 0xFFFFF80002F8376B)
Error: IRQL_NOT_LESS_OR_EQUAL
Bug check description: This indicates that Microsoft Windows or a kernel-mode driver accessed paged memory at DISPATCH_LEVEL or above.
This appears to be a typical software driver bug and is not likely to be caused by a hardware problem.
The crash took place in the Windows kernel. Possibly this problem is caused by another driver that cannot be identified at this time.


i'm posting the SF Diagnostic too