Random red pixel

Hi i just bought this XFX HD 7870 Core Edition. Sometimes there are random red dots on certain dark areas and worsen over time specially when i try to play videos. Help needed asap. I tried to update and rollback drivers in vain. Cable maybe? 

Try different cable, if that doesnt work make sure the card is plugged in all the way, the connectors are in all the way. When in doubt, RMA.