Colif :
how did you test the ram?
Can you download and run who crashed:
http://www.resplendence.com/whocrashed
it will create a summary of the errors and might show us more details about crashed.
Copy/paste the summary in here
they all look memory related, but they may also be drivers not hardware. we shall see from summary...
This is what it gave me.. And i have run regular Windows Memory Diagnostic and memtest with both cards in and 1 card in at a time.
On Tue 12/13/2016 8:47:46 AM your computer crashed
crash dump file: C:\WINDOWS\Minidump\121316-27046-01.dmp
This was probably caused by the following module: ntoskrnl.exe (nt+0x14A6F0)
Bugcheck code: 0x1A (0x41793, 0xFFFF80813C49FFF0, 0x64, 0x63)
Error: MEMORY_MANAGEMENT
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 a severe memory management error occurred.
This might be a case of memory corruption. More often memory corruption happens because of software errors in buggy drivers, not because of faulty RAM modules. This problem might also be caused because of overheating (thermal issue).
The crash took place in the Windows kernel. Possibly this problem is caused by another driver that cannot be identified at this time.
On Tue 12/13/2016 8:47:46 AM 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: 0x1A (0x41793, 0xFFFF80813C49FFF0, 0x64, 0x63)
Error: MEMORY_MANAGEMENT
Bug check description: This indicates that a severe memory management error occurred.
This might be a case of memory corruption. More often memory corruption happens because of software errors in buggy drivers, not because of faulty RAM modules. This problem might also be caused because of overheating (thermal issue).
The crash took place in the Windows kernel. Possibly this problem is caused by another driver that cannot be identified at this time.
On Mon 12/12/2016 10:27:58 PM your computer crashed
crash dump file: C:\WINDOWS\Minidump\121316-24500-01.dmp
This was probably caused by the following module: ntoskrnl.exe (nt+0x14A6F0)
Bugcheck code: 0x4E (0x2, 0x1D0442, 0x42FDFF, 0x1)
Error: PFN_LIST_CORRUPT
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 the page frame number (PFN) list is corrupted.
This appears to be a typical software driver bug and is not likely to be caused by a hardware problem. This might be a case of memory corruption. More often memory corruption happens because of software errors in buggy drivers, not because of faulty RAM modules.
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 12/7/2016 11:42:28 PM your computer crashed
crash dump file: C:\WINDOWS\Minidump\120816-21515-01.dmp
This was probably caused by the following module: ntoskrnl.exe (nt+0x14A510)
Bugcheck code: 0x19 (0x3, 0xFFFFC80CA40CD010, 0xFFFFC80CA40C5010, 0xFFFFC80CA40CD010)
Error: BAD_POOL_HEADER
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 a pool header is corrupt.
This appears to be a typical software driver bug and is not likely to be caused by a hardware problem. This might be a case of memory corruption. More often memory corruption happens because of software errors in buggy drivers, not because of faulty RAM modules. This problem might also be caused because of overheating (thermal issue).
The crash took place in the Windows kernel. Possibly this problem is caused by another driver that cannot be identified at this time.
On Tue 12/6/2016 10:13:32 AM your computer crashed
crash dump file: C:\WINDOWS\Minidump\120616-25281-01.dmp
This was probably caused by the following module: ntoskrnl.exe (nt+0x1A8560)
Bugcheck code: 0x1000007E (0xFFFFFFFFC0000005, 0xFFFFF802097AF560, 0xFFFFB401E2FC6768, 0xFFFFB401E2FC5F90)
Error: SYSTEM_THREAD_EXCEPTION_NOT_HANDLED_M
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 a system thread generated an exception which the error handler did not catch.
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.