Random BSODs after motherboard change

Hi!
So basically after changing my motherboard I've started having random BSODs once or twice a week. Never had any problems with BSODs before, they started occuring when I changed mobo to fit my stuff into new case.
Things I did:
- checked RAM (no problems)
- checked Drive
- checked cpu
- updated drivers, bios etc.
- ran driver verifier
WhoCrashed shows various things causing the bsod like:
ntkrnlmp.exe (SYSTEM_SERVICE_EXCEPTION);
ntfs.sys (Error: NTFS_FILE_SYSTEM);
nvlddmkm.sys (SYSTEM_SERVICE_EXCEPTION);
ntoskrnl.exe (KMODE_EXCEPTION_NOT_HANDLED);
Unknown (0xFFFFF880053EEE80) (SYSTEM_THREAD_EXCEPTION_NOT_HANDLED_M);
ntoskrnl.exe (UNEXPECTED_KERNEL_MODE_TRAP);
ntoskrnl.exe (PAGE_FAULT_IN_NONPAGED_AREA);

BSODs started appearing when I started using this new motherboard, and they haven't stopped after installing fresh OS.
My specs:
Intel Core 2 Quad CPU Q6600
GeForce 8600 GT
asus p5ql-cm motherboard
2x Goodram ddr 2gb 667MHz
Windows 7 Pro N (64 bit)
(If something more is needed, I'll add it)

What's exactly happening: I just use my pc for browsing stuff and watching youtube and then BSOD occurs; even if leave my pc and don't do anything BSOD occurs.

That's all I can think of right now and I'm out of ideas,
Thank you in advance for the help.