Asus R7 260x problems need some help

If i open up a program or i go on youtube, green fuzzy lines appear and it sometimes freezes and tells me "Display driver has stopped working but has successfuly recovered". Sometimes blue screen, blank/black screen need to restart pc.

What should i suppose to do?

 

my spec pc.

Amd Anthlon II x3 455 (soon upgrade fx 6300)

1x4 gb , 1x2 gb ram (soon upgrade 2x4 gb ram)

asus r7260x-dc2oc-2gd5

GA-78LMT-S2P (rev. 5.x)

psu AVF 750w

 

Have you downloaded the latest stable drivers? If that doesn't work try removing and rplacing the graphics card back into it's pcie slot