Hd7870 tearing

Hi Logan or Wendell or whoever can help me, I'm having this very wierd tearing point in my monitor and I realy don't know why. I looked for help everywhere and I just can't find an answer, so I hope you guys can fix this.

It all started when my old motherboard an p8z68v-pro died and I had to get a new one. I bought an asrock z77extreme3, installed the new system, downloaded all the newest drivers, and then I started seen an tearing point in one of my monitors, when I hooked up my second monitor (which is actually a TV). As mentioned before I have an Asus HD7870 and tried all possible solutions that I could think, first I tried google, but I had no answer then I reinstalled the drivers, changed the cables, changed the slot of my GPU , tried to use other monitors to see if the problem persisted, even reinstalled windows, but nothing happened. So as an regular watcher of the show, I thougth maybe you guys could help me

Ps: The tearing point appears at all the time, not only when playing games or watching videos and only when I have 2 monitors hooked up, and also sorry for my english, I'm from brazil.

This should not be in the inbox. Move it to the GPU section. Also, you posted this twice.

sorry for that, I'm new to the forum

No problem. As for your question, are you sure you completely uninstalled the old drivers?

yes

please help me, I'm kinda desperate