AMD Radeon 6800 HD randomly crashes to black screen, wonky sound, not reproduceable error.

Hi everyone;

Been having trouble with my AMD Radeon 6800 HD card, I think.

Symptoms:

- Cut to a black screen.
- Alternatively, when enabled "Graphics OverDrive" in "Performance" in Catalyst Control Center, instead of cutting to a black screen, it cuts to a bunch of linear cubes, then black. No error is displayed.
- Sound plays as normal for a few more seconds, but goes wonky after.
- Unresponsive to anything. Cannot Ctrl-Alt-Delete or Alt-Ft. Requires a hard reboot by pressing power button.
- It's considered disconnected to any online services (Vs. when a program crashes sometimes it's still "online" if you don't close the error prompt)

It seems that I can play multiple games at the same time with no problems (For example, Starcraft 2, Tropico 4 and Sims 3 at the same time ), but when I run the MMO Mabinogi, this occurs after an entirely random time. It is not reproduceable. There is no common denominator. I could be killing monsters, or fishing, or just AFKing. It could happen as soon as I start the program, or it can happen 6 hours in.

Doing a quick google search suggests that it is a problem with the card as I found similar issues with another game but no solutions. - Forum - Technical & Account Support - Computer Crashes after random time played. - Path of Exile

Things I've tried but didn't work:

- Reinstallation of the game
- Registry cleaning
- Changing settings on the "Overdrive" in Catalyst Control Center.
- Resetting all settings to Default in the catalyst Control Center.

Any help would be greatly appreciated. Thanks in advance.


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System Information
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Time of this report: 4/7/2013, 15:01:48
Machine name: PANDA-PC
Operating System: Windows 7 Home Premium 64-bit (6.1, Build 7601) Service Pack 1 (7601.win7sp1_gdr.120830-0333)
Language: English (Regional Setting: English)
System Manufacturer: System manufacturer
System Model: System Product Name
BIOS: BIOS Date: 02/05/10 19:13:52 Ver: 08.00.10
Processor: Intel(R) Core(TM) i7-2600K CPU @ 3.40GHz (8 CPUs), ~3.4GHz
Memory: 8192MB RAM
Available OS Memory: 8174MB RAM
Page File: 2760MB used, 13584MB available
Windows Dir: C:\Windows
DirectX Version: DirectX 11
DX Setup Parameters: Not found
User DPI Setting: Using System DPI
System DPI Setting: 96 DPI (100 percent)
DWM DPI Scaling: Disabled
DxDiag Version: 6.01.7601.17514 64bit Unicode

------------
DxDiag Notes
------------
Display Tab 1: No problems found.
Sound Tab 1: No problems found.
Sound Tab 2: No problems found.
Sound Tab 3: No problems found.
Sound Tab 4: No problems found.
Input Tab: No problems found.

--------------------
DirectX Debug Levels
--------------------
Direct3D: 0/4 (retail)
DirectDraw: 0/4 (retail)
DirectInput: 0/5 (retail)
DirectMusic: 0/5 (retail)
DirectPlay: 0/9 (retail)
DirectSound: 0/5 (retail)
DirectShow: 0/6 (retail)

---------------
Display Devices
---------------
Card name: AMD Radeon HD 6800 Series
Manufacturer: Advanced Micro Devices, Inc.
Chip type: AMD Radeon Graphics Processor (0x6738)
DAC type: Internal DAC(400MHz)
Device Key: Enum\PCI\VEN_1002&DEV_6738&SUBSYS_23051787&REV_00
Display Memory: 745 MB
Dedicated Memory: 1010 MB
Shared Memory: 3830 MB
Current Mode: 1280 x 1024 (32 bit) (60Hz)
Monitor Name: Generic PnP Monitor
Monitor Model: Hanns.G iX191
Monitor Id: HSD2528
Native Mode: 1280 x 1024(p) (60.020Hz)
Output Type: HD15
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: 8.17.0010.1172 (English)
Driver Version: 9.12.0.0
DDI Version: 11
Driver Model: WDDM 1.1
Driver Attributes: Final Retail
Driver Date/Size: 12/19/2012 16:08:04, 1151488 bytes
WHQL Logo'd: Yes
WHQL Date Stamp:
Device Identifier: {D7B71EE2-2478-11CF-A370-0F03BEC2C535}
Vendor ID: 0x1002
Device ID: 0x6738
SubSys ID: 0x23051787
Revision ID: 0x0000
Driver Strong Name: oem36.inf:ATI.Mfg.NTamd64.6.1:ati2mtag_NI:9.12.0.0ci\ven_1002&dev_6738
Rank Of Driver: 00E62001
Video Accel: ModeMPEG2_A ModeMPEG2_C
Deinterlace Caps: {6E8329FF-B642-418B-BCF0-BCB6591E255F}: Format(In/Out)=(YUY2,YUY2) Frames(Prev/Fwd/Back)=(0,0,1) Caps=VideoProcess_YUV2RGB VideoProcess_StretchX VideoProcess_StretchY DeinterlaceTech_PixelAdaptive
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D3D9 Overlay: Not Supported
DXVA-HD: Not Supported
DDraw Status: Enabled
D3D Status: Enabled
AGP Status: Enabled