Lines/shapes/flashing across screen whenever I play games.

[harlequin_07]

Hi guys, my friend helped me build a pc approx 1 year ago and for the past couple of weeks I've had strange colourful lines/shapes appear on the screen only when playing games. Sometimes they are horizontal and sometimes they pick up on something moving and pivot lines across my screen from it. I swapped GPU's with my friend's PC and it didn't happen on my PC or his, I also switched the monitor cables over to a HDMI and it didn't fix it. I've went through all the drivers and updated them and it didn't fix it. My friend also cable tied the edge of the GPU higher incase it was sagging due to heat and it still didn't work. I've also only seen it reach 68C on the GPU. Also completely reformatted PC twice.

[video="https://www.youtube.com/watch?v=ZBgBJQhuPmE"][/video] I'm sort of out of ideas, can somebody please help?

BUILD:
ASUS VE278H 27in Widescreen LED Monitor
Corsair Hydro Series H100i CPU Cooler
MSI Z97 Gaming 3 Motherboard
Kingston HyperX 3K 120GB SSD
ASUS PCE-N15 Wireless N PCIe Adaptor
Intel Core i7 4790S
Microsoft Windows 7 Professional 64bit with SP1 OEM
MSI Radeon R9 290 Gaming 4GB
Aerocool VP750 750W True Power
Kingston HyperX Savage HX321C11SRK2/8 8GB (2x4GB) Red DDR3
Western Digital WD Black WD2003FZEX 2TB
ASUS DRW-24D3ST 24x DVD Writer

 

[Rogue Leader]

Are you overclocking?

If not then thats a sign the GPU is failing, probably a memory issue. Is it under warranty?

 

[harlequin_07]

No, it's never been overclocked, Ye it still has warranty and I have no over ideas on how to fix it so I guess I'll RMA.

Are you overclocking?

If not then thats a sign the GPU is failing, probably a memory issue. Is it under warranty?