BSOD Crossfire Gaming, HD7870. (atikmdag+0x7C1DD)

As i said ive just installed the 2 x HD7870 and a brand new 750 w PSU. Cleensweeped the Displaydrivers and reinstalled amd 14.4 catalyst suit. As soon as i try to play or do a gpu test i get BSOD.

Here:

System Information (local)
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computer name: FAMILJEN
windows version: Windows 8.1 , 6.2, build: 9200
windows dir: C:\WINDOWS
Hardware: ASUSTeK COMPUTER INC., P8Z77-V LX
CPU: GenuineIntel Intel(R) Core(TM) i5-3570K CPU @ 3.40GHz Intel586, level: 6
4 logical processors, active mask: 15
RAM: 12826996736 total




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Crash Dump Analysis
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Crash dump directory: C:\WINDOWS\Minidump

Crash dumps are enabled on your computer.

On Tue 2014-09-16 18:08:35 GMT your computer crashed
crash dump file: C:\WINDOWS\Minidump\091614-24875-01.dmp
This was probably caused by the following module: atikmdag.sys (atikmdag+0x7C1DD)
Bugcheck code: 0x3B (0xC0000094, 0xFFFFF800187181DD, 0xFFFFD000263713C0, 0x0)
Error: SYSTEM_SERVICE_EXCEPTION
file path: C:\WINDOWS\system32\drivers\atikmdag.sys
product: ATI Radeon Family
company: Advanced Micro Devices, Inc.
description: ATI Radeon Kernel Mode Driver
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: atikmdag.sys (ATI Radeon Kernel Mode Driver, Advanced Micro Devices, Inc.).
Google query: Advanced Micro Devices, Inc. SYSTEM_SERVICE_EXCEPTION



On Tue 2014-09-16 18:05:16 GMT your computer crashed
crash dump file: C:\WINDOWS\Minidump\091614-23656-01.dmp
This was probably caused by the following module: atikmdag.sys (atikmdag+0x7C1DD)
Bugcheck code: 0x3B (0xC0000094, 0xFFFFF800984A21DD, 0xFFFFD0002A3063C0, 0x0)
Error: SYSTEM_SERVICE_EXCEPTION
file path: C:\WINDOWS\system32\drivers\atikmdag.sys
product: ATI Radeon Family
company: Advanced Micro Devices, Inc.
description: ATI Radeon Kernel Mode Driver
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: atikmdag.sys (ATI Radeon Kernel Mode Driver, Advanced Micro Devices, Inc.).
Google query: Advanced Micro Devices, Inc. SYSTEM_SERVICE_EXCEPTION



On Tue 2014-09-16 18:03:48 GMT your computer crashed
crash dump file: C:\WINDOWS\Minidump\091614-27609-01.dmp
This was probably caused by the following module: atikmdag.sys (atikmdag+0x7C1DD)
Bugcheck code: 0x1000007E (0xFFFFFFFFC0000094, 0xFFFFF80138EE01DD, 0xFFFFD0002435A9D8, 0xFFFFD0002435A1E0)
Error: SYSTEM_THREAD_EXCEPTION_NOT_HANDLED_M
file path: C:\WINDOWS\system32\drivers\atikmdag.sys
product: ATI Radeon Family
company: Advanced Micro Devices, Inc.
description: ATI Radeon Kernel Mode Driver
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.
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: atikmdag.sys (ATI Radeon Kernel Mode Driver, Advanced Micro Devices, Inc.).
Google query: Advanced Micro Devices, Inc. SYSTEM_THREAD_EXCEPTION_NOT_HANDLED_M



On Tue 2014-09-16 15:39:42 GMT your computer crashed
crash dump file: C:\WINDOWS\Minidump\091614-28937-01.dmp
This was probably caused by the following module: atikmdag.sys (atikmdag+0x7C1DD)
Bugcheck code: 0x1000007E (0xFFFFFFFFC0000094, 0xFFFFF801D73701DD, 0xFFFFD00073DAD9D8, 0xFFFFD00073DAD1E0)
Error: SYSTEM_THREAD_EXCEPTION_NOT_HANDLED_M
file path: C:\WINDOWS\system32\drivers\atikmdag.sys
product: ATI Radeon Family
company: Advanced Micro Devices, Inc.
description: ATI Radeon Kernel Mode Driver
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.
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: atikmdag.sys (ATI Radeon Kernel Mode Driver, Advanced Micro Devices, Inc.).
Google query: Advanced Micro Devices, Inc. SYSTEM_THREAD_EXCEPTION_NOT_HANDLED_M


I just downloaded the latest beta 14,7 to try but i guess it wont help.....

Any kind of help would be fantastic!

Sorry for my late reply...

Yesterday i got artifacts all over the screen and had to restore. But today i think ive found the solution.
I have a 144hz screen and thats not possible to run with my setup. It should work with 120 hz. Ill come back with info as soon as ive intalled everthing and tryed.....