Display Driver not responding = Crash

[Daemion]

I recently upgraded my rig and have been having trouble with FFXIV running consistently.
Current SET UP:

Operating System: Windows 7 Home Premium 64-bit (6.1, Build 7601) Service Pack 1 (7601.win7sp1_gdr.110408-1631)
Language: English (Regional Setting: English)
BIOS: BIOS Date: 08/18/10 17:03:35 Ver: 10.06
Processor: AMD Phenom™ II X4 955 Processor (4 CPUs), ~3.2GHz
Memory: 4096MB RAM
Page File: 1628MB used, 6559MB available
DirectX Version: DirectX 11
Card name: Sapphire AMD Radeon HD 6850
Manufacturer: ATI Technologies Inc.
Chip type: ATI display adapter (0x6739)
Driver Name: aticfx64.dll,aticfx64.dll,aticfx64.dll,aticfx32,aticfx32,aticfx32,atiumd64.dll,atidxx64.dll,atidxx64.dll,atiumdag,atidxx32,atidxx32,atiumdva,atiumd6a.cap,atitmm64.dll
Driver File Version: 8.17.0010.1077 (English)
Driver Version: 8.850.0.0
DDI Version: 11
Driver Model: WDDM 1.1
DAC type: Internal DAC(400MHz)
Device Key: Enum\PCI\VEN_1002&DEV_6739&SUBSYS_E174174B&REV_00
Display Memory: 2803 MB
Dedicated Memory: 1012 MB
Shared Memory: 1791 MB
Current Mode: 1680 x 1050 (32 bit) (60Hz)
PSU: PowerUp! GEN-2004 550 Watt ATX Power Supply

So the problem I seem to be having is that my game won't consistently stay operational. I get random freezes then the monitor flickers and comes back on giving me an error bubble stating that My Display Driver stopped responding.
I'm not so sure what to do from here on in as it just randomly happens.. sometimes I can't even get past the avatar login screen. I cannot play more then 5 minutes... It runs great, smooth framerate, great settings.. but then.. flickr.. crash... Also I have been running Total War Shogun II at high settings without these problems.

Any suggestions would be GREAT! TY