Sorry I thought I did at the time.
Video Card: Gigabyte Radeon HD 7870 GHz Edition (GV-R787OC-2GD)
Operating System: Windows 7 x64
Catalyst Driver: Currently on 13.12 but have tried 14.4, 14.6 and 14.7
Games: Usually in all Source games (CS:GO, Dota 2) there is lots of artifacting and flickering of textures but I've also tried Payday 2 and the artifacting is much, much less. Tried reducing the anti-aliasing and such but no change occurs.
Motherboard: MSI B85M-E45
CPU: Intel i5-4440 @ 3.10GHz
Underclocking: I have reduced my Memory and Core clocks by half and they've reduced the erraticness of the artifacting though it is still present and quite annoying. I used MSI Afterburner to underclock and reduced the Memory and Core clocks to 600 and 500MHz respectively.