Bonjour,  
 
J'ai eu quelques écran bleu "de la mort" et apparement ça viendrait a chaque fois de ntoskrnl.exe mais avec des erreurs différentes:
 
On Fri 10/03/2017 21:10:52 your computer crashed
crash dump file: C:\WINDOWS\Minidump\031017-5203-01.dmp
This was probably caused by the following module: ntoskrnl.exe (nt+0x14A6F0)  
Bugcheck code: 0xA (0x14, 0x2, 0x1, 0xFFFFF8034B4D0073)
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 08/03/2017 23:56:11 your computer crashed
crash dump file: C:\WINDOWS\Minidump\030817-5390-01.dmp
This was probably caused by the following module: ntoskrnl.exe (nt+0x14A6F0)  
Bugcheck code: 0x1E (0xFFFFFFFFC0000005, 0xFFFFF802D3AF14B2, 0x0, 0xFFFFFFFFFFFFFFFF)
Error: KMODE_EXCEPTION_NOT_HANDLED
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 kernel-mode program 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.  
 
 
 
On Tue 07/03/2017 19:35:41 your computer crashed
crash dump file: C:\WINDOWS\Minidump\030717-5484-01.dmp
This was probably caused by the following module: ntoskrnl.exe (nt+0x14A6F0)  
Bugcheck code: 0x133 (0x0, 0x501, 0x500, 0x0)
Error: DPC_WATCHDOG_VIOLATION
file path: C:\WINDOWS\system32\ntoskrnl.exe
product: Microsoft® Windows® Operating System
company: Microsoft Corporation
description: NT Kernel & System
Bug check description: The DPC watchdog detected a prolonged run time at an IRQL of DISPATCH_LEVEL or above.
This appears to be a typical software driver bug and is not likely to be caused by a hardware problem. 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.  
 
 
 
 
 
Conclusion
 
 
3 crash dumps have been found and analyzed. No offending third party drivers have been found. Connsider using WhoCrashed Professional which offers more detailed analysis using symbol resolution. Also configuring your system to produce a full memory dump may help you.  
 
 
Read the topic general suggestions for troubleshooting system crashes for more information.  
 
Note that it's not always possible to state with certainty whether a reported driver is responsible for crashing your system or that the root cause is in another module. Nonetheless it's suggested you look for updates for the products that these drivers belong to and regularly visit Windows update or enable automatic updates for Windows. In case a piece of malfunctioning hardware is causing trouble, a search with Google on the bug check errors together with the model name and brand of your computer may help you investigate this further.
 
 
 
Bon j'ai encore eu un crash à cause d'un autre module:
 
On Sat 11/03/2017 09:58:26 your computer crashed
crash dump file: C:\WINDOWS\Minidump\031117-5109-01.dmp
This was probably caused by the following module: nvlddmkm.sys (nvlddmkm+0x1B2257)  
Bugcheck code: 0x3B (0xC0000005, 0xFFFFF802E9242257, 0xFFFFC281F70786F0, 0x0)
Error: SYSTEM_SERVICE_EXCEPTION
file path: C:\WINDOWS\System32\DriverStore\FileRepository\nv_desktop_ref4i.inf_amd64_819b4ed621113863\nvlddmkm.sys
product: NVIDIA Windows Kernel Mode Driver, Version 378.78  
company: NVIDIA Corporation
description: NVIDIA Windows Kernel Mode Driver, Version 378.78  
Bug check description: This indicates that an exception happened while executing a routine that transitions from non-privileged code to privileged code.  
This appears to be a typical software driver bug and is not likely to be caused by a hardware problem.  
A third party driver was identified as the probable root cause of this system error. It is suggested you look for an update for the following driver: nvlddmkm.sys (NVIDIA Windows Kernel Mode Driver, Version 378.78 , NVIDIA Corporation).  
Google query: NVIDIA Corporation SYSTEM_SERVICE_EXCEPTION
 
Conclusion
 
 
4 crash dumps have been found and analyzed. A third party driver has been identified to be causing system crashes on your computer. It is strongly suggested that you check for updates for these drivers on their company websites. Click on the links below to search with Google for updates for these drivers:  
 
nvlddmkm.sys (NVIDIA Windows Kernel Mode Driver, Version 378.78 , NVIDIA Corporation)
 
If no updates for these drivers are available, try searching with Google on the names of these drivers in combination with the errors that have been reported for these drivers. Include the brand and model name of your computer as well in the query. This often yields interesting results from discussions on the web by users who have been experiencing similar problems.
 
 
Read the topic general suggestions for troubleshooting system crashes for more information.  
 
Note that it's not always possible to state with certainty whether a reported driver is responsible for crashing your system or that the root cause is in another module. Nonetheless it's suggested you look for updates for the products that these drivers belong to and regularly visit Windows update or enable automatic updates for Windows. In case a piece of malfunctioning hardware is causing trouble, a search with Google on the bug check errors together with the model name and brand of your computer may help you investigate this further.  
 
 
 
J'ai déjà fais des analyse anti virus et diagnostic de mémoire windows et aucune erreurs, j'ai aussi mon windows et mes pilotes bien à jour.
 
 
 
Merci pour votre aide

salut, attrape crystal disk info et fait le test disque dur

Vérifie que ta carte graphique est bien branchée (carte mère et alim).
 
Vérifie aussi que ton alim fourni bien des tensions correctes et assez de puissance.

Ok merci de vos réponses, crystal disk info ne signale rien de spécial,  
l'état est correct pour mon SSD et Disque dur, le SSD est à environ 40° et le Disque dur 28°.
Ma carte graphique est bien branchée (Si elle l'était mal elle serait même pas détectée non ?).
Avec cette alim je n'avais pas de problèmes, la tension je sais pas mais j'ai du 650w pour une gtx 970 ça devrait suffire.
 
Ma config:  
 
LEPA MX F1, 650W
NZXT Phantom 410, Blanc
Sandisk SSD PLUS, 240 Go, SATA III
Seagate Barracuda, 1 To
KFA2 GeForce GTX 970 EXOC Black Edition, 4 Go
Arctic Cooling Freezer 13
DDR3 Kingston HyperX Fury White, 2 x 4 Go, 1866 MHz, CAS 10
MSI Z97S SLI Krait Edition
Intel Core i5-4690K (3.5 GHz )