A few little black screen with my hackintosh!

[LeMrDeyDey]

Good morning, afternoon...
Ok, I have make my hackintosh with Yosemite 10.10.3 14d136 and it Works good!
But I have a little probleu, a Few times I have a black screen for 1-2 seconds and then everything returns to normal. And after some time, it begins again...

thank you for your Help!

And sorry for my bas english because I don't speak english a lot of Times.

 

[LeMrDeyDey]

My hackintosh =

Dualboot with Windows 8
i5 4690k
Asus gtx 970 with the News nvidia drivers
gigabyte z97x ud5h
8 GB 1600 MHz ram

and if it's important I have a triple monitor set up.

 

[LeMrDeyDey]

 

[LeMrDeyDey]

And they are very short (like 2 seconds)

 

[LeMrDeyDey]

 

[LeMrDeyDey]