Hello. I've been constantly having this BSOD for 3 months. Never had such persistent problem before so i'm looking for some input.
I started having problems when i attached a WD passport hdd to my pc - it would constantly crash, i couldn't overclock my cpu and i couldn't put more than 4gb of ram. Then i found out there's an option i had to DISABLE in bios for it to work right and the problems seemingly stopped. I could overclock my cpu and put more ram but shorty after problems started occuring again, i rolled back everything i did even reinstalled my windows but 7f still happens. I'm CURRENTLY removed the hdd and waiting to see if it happens again. The problem is i have no idea what could be causing it if the hdd is not the problem, and if it is i have no option of not using it - i have a lot of files on it.
I've downloaded a PROGRAM CALLED blue screen view and here's what it shows:


==================================================
Dump File : 041912-17487-01.dmp
Crash Time : 19.4.2012 г. 02:06:19 ч.
Bug Check String : UNEXPECTED_KERNEL_MODE_TRAP
Bug Check Code : 0x0000007f
Parameter 1 : 00000000`00000008
Parameter 2 : 00000000`80050031
Parameter 3 : 00000000`000406f8
Parameter 4 : fffff800`0308fec8
Caused By Driver : ntoskrnl.exe
Caused By Address : ntoskrnl.exe+70740
File Description : NT Kernel & System
Product Name : Microsoft® Windows® Operating System
Company : Microsoft Corporation
File Version : 6.1.7600.16617 (win7_gdr.100618-1621)
Processor : x64
Crash Address : ntoskrnl.exe+70740
Stack Address 1 :
Stack Address 2 :
Stack Address 3 :
Computer Name :
Full Path : C:\Windows\Minidump\041912-17487-01.dmp
Processors Count : 4
Major Version : 15
Minor Version : 7600
Dump File Size : 290832
==================================================

==================================================
Dump File : 041712-19141-01.dmp
Crash Time : 17.4.2012 г. 15:02:49 ч.
Bug Check String : UNEXPECTED_KERNEL_MODE_TRAP
Bug Check Code : 0x0000007f
Parameter 1 : 00000000`00000008
Parameter 2 : 00000000`80050031
Parameter 3 : 00000000`000406f8
Parameter 4 : fffff800`0303bec8
Caused By Driver : ntoskrnl.exe
Caused By Address : ntoskrnl.exe+70740
File Description : NT Kernel & System
Product Name : Microsoft® Windows® Operating System
Company : Microsoft Corporation
File Version : 6.1.7600.16617 (win7_gdr.100618-1621)
Processor : x64
Crash Address : ntoskrnl.exe+70740
Stack Address 1 :
Stack Address 2 :
Stack Address 3 :
Computer Name :
Full Path : C:\Windows\Minidump\041712-19141-01.dmp
Processors Count : 4
Major Version : 15
Minor Version : 7600
Dump File Size : 290624
==================================================

==================================================
Dump File : 040812-13868-01.dmp
Crash Time : 8.4.2012 г. 14:05:04 ч.
Bug Check String : UNEXPECTED_KERNEL_MODE_TRAP
Bug Check Code : 0x0000007f
Parameter 1 : 00000000`00000008
Parameter 2 : 00000000`80050031
Parameter 3 : 00000000`000406f8
Parameter 4 : fffff800`0304cec8
Caused By Driver : ntoskrnl.exe
Caused By Address : ntoskrnl.exe+70740
File Description : NT Kernel & System
Product Name : Microsoft® Windows® Operating System
Company : Microsoft Corporation
File Version : 6.1.7600.16617 (win7_gdr.100618-1621)
Processor : x64
Crash Address : ntoskrnl.exe+70740
Stack Address 1 :
Stack Address 2 :
Stack Address 3 :
Computer Name :
Full Path : C:\Windows\Minidump\040812-13868-01.dmp
Processors Count : 4
Major Version : 15
Minor Version : 7600
Dump File Size : 290800
==================================================

==================================================
Dump File : 040612-20701-01.dmp
Crash Time : 6.4.2012 г. 11:10:26 ч.
Bug Check String : UNEXPECTED_KERNEL_MODE_TRAP
Bug Check Code : 0x0000007f
Parameter 1 : 00000000`00000008
Parameter 2 : 00000000`80050031
Parameter 3 : 00000000`000406f8
Parameter 4 : fffff800`03038ec8
Caused By Driver : ntoskrnl.exe
Caused By Address : ntoskrnl.exe+70740
File Description : NT Kernel & System
Product Name : Microsoft® Windows® Operating System
Company : Microsoft Corporation
File Version : 6.1.7600.16617 (win7_gdr.100618-1621)
Processor : x64
Crash Address : ntoskrnl.exe+70740
Stack Address 1 :
Stack Address 2 :
Stack Address 3 :
Computer Name :
Full Path : C:\Windows\Minidump\040612-20701-01.dmp
Processors Count : 4
Major Version : 15
Minor Version : 7600
Dump File Size : 290760
==================================================

==================================================
Dump File : 040412-16957-01.dmp
Crash Time : 4.4.2012 г. 13:02:27 ч.
Bug Check String : UNEXPECTED_KERNEL_MODE_TRAP
Bug Check Code : 0x0000007f
Parameter 1 : 00000000`00000008
Parameter 2 : 00000000`80050031
Parameter 3 : 00000000`000406f8
Parameter 4 : fffff800`0303dec8
Caused By Driver : ntoskrnl.exe
Caused By Address : ntoskrnl.exe+70740
File Description : NT Kernel & System
Product Name : Microsoft® Windows® Operating System
Company : Microsoft Corporation
File Version : 6.1.7600.16617 (win7_gdr.100618-1621)
Processor : x64
Crash Address : ntoskrnl.exe+70740
Stack Address 1 :
Stack Address 2 :
Stack Address 3 :
Computer Name :
Full Path : C:\Windows\Minidump\040412-16957-01.dmp
Processors Count : 4
Major Version : 15
Minor Version : 7600
Dump File Size : 290824
==================================================

==================================================
Dump File : 033112-14398-01.dmp
Crash Time : 31.3.2012 г. 17:39:18 ч.
Bug Check String : UNEXPECTED_KERNEL_MODE_TRAP
Bug Check Code : 0x0000007f
Parameter 1 : 00000000`00000008
Parameter 2 : 00000000`80050031
Parameter 3 : 00000000`000406f8
Parameter 4 : fffff800`0308cec8
Caused By Driver : ntoskrnl.exe
Caused By Address : ntoskrnl.exe+70740
File Description : NT Kernel & System
Product Name : Microsoft® Windows® Operating System
Company : Microsoft Corporation
File Version : 6.1.7600.16617 (win7_gdr.100618-1621)
Processor : x64
Crash Address : ntoskrnl.exe+70740
Stack Address 1 :
Stack Address 2 :
Stack Address 3 :
Computer Name :
Full Path : C:\Windows\Minidump\033112-14398-01.dmp
Processors Count : 4
Major Version : 15
Minor Version : 7600
Dump File Size : 290816
==================================================

==================================================
Dump File : 033112-11980-01.dmp
Crash Time : 31.3.2012 г. 15:09:16 ч.
Bug Check String : UNEXPECTED_KERNEL_MODE_TRAP
Bug Check Code : 0x0000007f
Parameter 1 : 00000000`00000008
Parameter 2 : 00000000`80050031
Parameter 3 : 00000000`000406f8
Parameter 4 : fffff800`03096ec8
Caused By Driver : ntoskrnl.exe
Caused By Address : ntoskrnl.exe+70740
File Description : NT Kernel & System
Product Name : Microsoft® Windows® Operating System
Company : Microsoft Corporation
File Version : 6.1.7600.16617 (win7_gdr.100618-1621)
Processor : x64
Crash Address : ntoskrnl.exe+70740
Stack Address 1 :
Stack Address 2 :
Stack Address 3 :
Computer Name :
Full Path : C:\Windows\Minidump\033112-11980-01.dmp
Processors Count : 4
Major Version : 15
Minor Version : 7600
Dump File Size : 290816
==================================================

==================================================
Dump File : 032812-17128-01.dmp
Crash Time : 28.3.2012 г. 11:04:52 ч.
Bug Check String : UNEXPECTED_KERNEL_MODE_TRAP
Bug Check Code : 0x0000007f
Parameter 1 : 00000000`00000008
Parameter 2 : 00000000`80050031
Parameter 3 : 00000000`000406f8
Parameter 4 : fffff800`0303dec8
Caused By Driver : ntoskrnl.exe
Caused By Address : ntoskrnl.exe+70740
File Description : NT Kernel & System
Product Name : Microsoft® Windows® Operating System
Company : Microsoft Corporation
File Version : 6.1.7600.16617 (win7_gdr.100618-1621)
Processor : x64
Crash Address : ntoskrnl.exe+70740
Stack Address 1 :
Stack Address 2 :
Stack Address 3 :
Computer Name :
Full Path : C:\Windows\Minidump\032812-17128-01.dmp
Processors Count : 4
Major Version : 15
Minor Version : 7600
Dump File Size : 290832
==================================================

==================================================
Dump File : 032712-14102-01.dmp
Crash Time : 27.3.2012 г. 19:58:56 ч.
Bug Check String : UNEXPECTED_KERNEL_MODE_TRAP
Bug Check Code : 0x0000007f
Parameter 1 : 00000000`00000008
Parameter 2 : 00000000`80050031
Parameter 3 : 00000000`000406f8
Parameter 4 : fffff800`0304cec8
Caused By Driver : ntoskrnl.exe
Caused By Address : ntoskrnl.exe+70740
File Description : NT Kernel & System
Product Name : Microsoft® Windows® Operating System
Company : Microsoft Corporation
File Version : 6.1.7600.16617 (win7_gdr.100618-1621)
Processor : x64
Crash Address : ntoskrnl.exe+70740
Stack Address 1 :
Stack Address 2 :
Stack Address 3 :
Computer Name :
Full Path : C:\Windows\Minidump\032712-14102-01.dmp
Processors Count : 4
Major Version : 15
Minor Version : 7600
Dump File Size : 290816
==================================================

==================================================
Dump File : 032512-14289-01.dmp
Crash Time : 25.3.2012 г. 12:26:41 ч.
Bug Check String : UNEXPECTED_KERNEL_MODE_TRAP
Bug Check Code : 0x0000007f
Parameter 1 : 00000000`00000008
Parameter 2 : 00000000`80050031
Parameter 3 : 00000000`000406f8
Parameter 4 : fffff800`03094ec8
Caused By Driver : ntoskrnl.exe
Caused By Address : ntoskrnl.exe+70740
File Description : NT Kernel & System
Product Name : Microsoft® Windows® Operating System
Company : Microsoft Corporation
File Version : 6.1.7600.16617 (win7_gdr.100618-1621)
Processor : x64
Crash Address : ntoskrnl.exe+70740
Stack Address 1 :
Stack Address 2 :
Stack Address 3 :
Computer Name :
Full Path : C:\Windows\Minidump\032512-14289-01.dmp
Processors Count : 4
Major Version : 15
Minor Version : 7600
Dump File Size : 290816
==================================================

==================================================
Dump File : 032312-13369-01.dmp
Crash Time : 23.3.2012 г. 02:52:37 ч.
Bug Check String : UNEXPECTED_KERNEL_MODE_TRAP
Bug Check Code : 0x0000007f
Parameter 1 : 00000000`00000008
Parameter 2 : 00000000`80050031
Parameter 3 : 00000000`000406f8
Parameter 4 : fffff800`02e8fec8
Caused By Driver : ntoskrnl.exe
Caused By Address : ntoskrnl.exe+70740
File Description : NT Kernel & System
Product Name : Microsoft® Windows® Operating System
Company : Microsoft Corporation
File Version : 6.1.7600.16617 (win7_gdr.100618-1621)
Processor : x64
Crash Address : ntoskrnl.exe+70740
Stack Address 1 :
Stack Address 2 :
Stack Address 3 :
Computer Name :
Full Path : C:\Windows\Minidump\032312-13369-01.dmp
Processors Count : 4
Major Version : 15
Minor Version : 7600
Dump File Size : 290776
==================================================

==================================================
Dump File : 032112-14071-01.dmp
Crash Time : 21.3.2012 г. 02:37:36 ч.
Bug Check String : UNEXPECTED_KERNEL_MODE_TRAP
Bug Check Code : 0x0000007f
Parameter 1 : 00000000`00000008
Parameter 2 : 00000000`80050031
Parameter 3 : 00000000`000406f8
Parameter 4 : fffff800`02e4bec8
Caused By Driver : ntoskrnl.exe
Caused By Address : ntoskrnl.exe+70740
File Description : NT Kernel & System
Product Name : Microsoft® Windows® Operating System
Company : Microsoft Corporation
File Version : 6.1.7600.16617 (win7_gdr.100618-1621)
Processor : x64
Crash Address : ntoskrnl.exe+70740
Stack Address 1 :
Stack Address 2 :
Stack Address 3 :
Computer Name :
Full Path : C:\Windows\Minidump\032112-14071-01.dmp
Processors Count : 4
Major Version : 15
Minor Version : 7600
Dump File Size : 285776
==================================================

==================================================
Dump File : 031712-14055-01.dmp
Crash Time : 17.3.2012 г. 13:12:04 ч.
Bug Check String : UNEXPECTED_KERNEL_MODE_TRAP
Bug Check Code : 0x0000007f
Parameter 1 : 00000000`00000008
Parameter 2 : 00000000`80050031
Parameter 3 : 00000000`000406f8
Parameter 4 : fffff800`02e4cec8
Caused By Driver : ntoskrnl.exe
Caused By Address : ntoskrnl.exe+70740
File Description : NT Kernel & System
Product Name : Microsoft® Windows® Operating System
Company : Microsoft Corporation
File Version : 6.1.7600.16617 (win7_gdr.100618-1621)
Processor : x64
Crash Address : ntoskrnl.exe+70740
Stack Address 1 :
Stack Address 2 :
Stack Address 3 :
Computer Name :
Full Path : C:\Windows\Minidump\031712-14055-01.dmp
Processors Count : 4
Major Version : 15
Minor Version : 7600
Dump File Size : 290800
==================================================

==================================================
Dump File : 031212-13228-01.dmp
Crash Time : 12.3.2012 г. 04:36:21 ч.
Bug Check String : UNEXPECTED_KERNEL_MODE_TRAP
Bug Check Code : 0x0000007f
Parameter 1 : 00000000`00000008
Parameter 2 : 00000000`80050031
Parameter 3 : 00000000`000406f8
Parameter 4 : fffff800`02e94ec8
Caused By Driver : ntoskrnl.exe
Caused By Address : ntoskrnl.exe+70740
File Description : NT Kernel & System
Product Name : Microsoft® Windows® Operating System
Company : Microsoft Corporation
File Version : 6.1.7600.16617 (win7_gdr.100618-1621)
Processor : x64
Crash Address : ntoskrnl.exe+70740
Stack Address 1 :
Stack Address 2 :
Stack Address 3 :
Computer Name :
Full Path : C:\Windows\Minidump\031212-13228-01.dmp
Processors Count : 4
Major Version : 15
Minor Version : 7600
Dump File Size : 290784
==================================================

==================================================
Dump File : 030812-13416-01.dmp
Crash Time : 8.3.2012 г. 23:25:55 ч.
Bug Check String : UNEXPECTED_KERNEL_MODE_TRAP
Bug Check Code : 0x0000007f
Parameter 1 : 00000000`00000008
Parameter 2 : 00000000`80050031
Parameter 3 : 00000000`000406f8
Parameter 4 : fffff800`02e95ec8
Caused By Driver : ntoskrnl.exe
Caused By Address : ntoskrnl.exe+70740
File Description : NT Kernel & System
Product Name : Microsoft® Windows® Operating System
Company : Microsoft Corporation
File Version : 6.1.7600.16617 (win7_gdr.100618-1621)
Processor : x64
Crash Address : ntoskrnl.exe+70740
Stack Address 1 :
Stack Address 2 :
Stack Address 3 :
Computer Name :
Full Path : C:\Windows\Minidump\030812-13416-01.dmp
Processors Count : 4
Major Version : 15
Minor Version : 7600
Dump File Size : 290832
==================================================

==================================================
Dump File : 030312-12058-01.dmp
Crash Time : 4.3.2012 г. 00:10:40 ч.
Bug Check String : UNEXPECTED_KERNEL_MODE_TRAP
Bug Check Code : 0x0000007f
Parameter 1 : 00000000`00000008
Parameter 2 : 00000000`80050031
Parameter 3 : 00000000`000406f8
Parameter 4 : fffff800`02e52ec8
Caused By Driver : ntoskrnl.exe
Caused By Address : ntoskrnl.exe+70740
File Description : NT Kernel & System
Product Name : Microsoft® Windows® Operating System
Company : Microsoft Corporation
File Version : 6.1.7600.16617 (win7_gdr.100618-1621)
Processor : x64
Crash Address : ntoskrnl.exe+70740
Stack Address 1 :
Stack Address 2 :
Stack Address 3 :
Computer Name :
Full Path : C:\Windows\Minidump\030312-12058-01.dmp
Processors Count : 4
Major Version : 15
Minor Version : 7600
Dump File Size : 290816
==================================================


You have RAM issues...on top of OC'ing making things HARDER to diagnose...
DLoad and run MemTest from a bootable CD...let it run minimum 1 hour...
Any errors at all you have a bad/mismatched stick of RAM.

I'd also suggest undoing any clocking until we find out what the issue is.I've undone any clocks. I currently run with one 2x2gb kit (Gskill). I've changed it with the other 2x2gb kit (A-data) to see if 7f happens. It still does. I even though of changing the motherboard.

I'll run memtest now.Seeya in an hour...Ran a bit more than an hour, no errors. I'm shutting down for the night, i'll see what tomorrow brings.