AMD HD 6990 Crash Error

Just to clarify, you mean the latest beta drivers as in 13.11 beta 9.2?

http://support.amd.com/en-us/download/desktop?os=Windows 8.1 - 64

The ones released on november 7th listed on this page.

 Edit:  as it turns out, the ones I have saved on my computer were version 8.  I will try these new ones and come back if anything comes up.

Have you checked out what your temps where doing, do you run a custome fan curve or keep the fan at a higher rpm manually?? I use to have the 6970 and these cards run hot, the fan profiles don't work on there own if you don't manually set up the fan speed or a custom curve. I've bounced off the 105c even seen 115c. But I have only received that message "DXGI_ERROR_DEVICE_REMOVED" while running 3dmark on my 290x. I was locking up at the second test every time, then would time out and that message popped up. Deleted 3dmark and reinstalled and it worked fine.