So I have recently "upgraded" from a 7790 OC to a 280X OC Direct CU II. Since ive bought it I had been running mantle but started getting my screen flooded with mainly purple and pink lines going horizontally from one side of the screen to the other, differing in length. Also there has been times when a whole portion of my screen would flash black completely hindering my ability to play games. All I was running was Garry's Mod. I have since then changed my driver (uninstalled mantle correctly) to 13.9 in which I received the same problem and then 13.12 which I yet again, received the same problem.
This has happened in Planetside 2, Orion: Dino Horde, Left for Dead 2 and worst of all Sniper Elite: Nazi Zombie Army 2 (which I think may be the game at fault due to complete crashing of the game which I havent experienced on any other game).
My card is running at a maximum of 40 degrees and my drivers are up to date. Everything is plugged in properly. My best bets at this moment would be that I run a cleaner through my PC (which I highly doubt is the problem) to get rid of all of the remaining remnants of switching drivers or that my monitor may be the problem, even though it ran on my 7790.
Im so confused as I did put down a lot of money for the card and it hurts my eyes with all the black flashing and lines (even though I dont regret it, Go AMD!).
Thank you in advance for anyone who helps and sorry for the block of text. Wanted to get as much information as possible as there have been similiar situations on the internet but none that have really helped.