Well, i am still having the problem it seems.
Know itīs been a year, but i recently wanted to do a total cleanup on the system.

OC a bit, stress test (only cpu is OCed) and do a clean install on everything.

Everything works fine, i stress tested very very much in all kinds of tests.

But still i do get the BSOD Video Scheduler randomly, itīs always that one.
And itīs coming even on stock, so it isnīt a CPU crash, atleast not from the OC.

But often i noticed that the screen would turn of and on.

You know when you get "Driver stopped responding", that kind of reset on the display.
But i donīt get the message, though i do sometimes.

And i think that itīs either, reset display, "driver stopped responding" or a BSOD.

Though i canīt replicate it. I have tried with stress testing the CPU and GPU.

Itīs driving me nuts, i canīt put my hands on it, never had this much trouble, starting to really think something is damaged;S

EDIT:

Also, weird enough.

When i was going to install windows 8, i heard this constant beep.
And i could only boot up to bios if i used "clear cmos" and went with default.

The culprit was AHCI. For some reason, if i activate it, it beeps when itīs trying to identify the HDD.
I canīt grasp why, as it has been activated for years;S
But when i change to IDE Enhanced, problems goes away and i can boot.