{F42354}Since I got my new graphic card ASUS Radeon HD 7970 DirectCU II I had several total system freezes while playing or even only loading Arma 3. It only occurs in Arma 3 and I have all latest drivers for my hardware. I even tested the beta driver for my GPU. My system is:

Motherboard: Asus P6T SE
CPU: Intel i7 950
RAM: 8 GB
GPU: ASUS Radeon HD 7970 DirectCU II
HDD: 2x 500 GB HDD Raid 0
Audio: RME Babyface
OS: Windows 7 Home Premium 64bit

I am not 100% sure how to reproduce. The first system freezes occured while just loading the Altis map (did not test other maps for now, sorry). Another time it occured while respawning in a game mode called "King of the Hill" on the server "Affen mit Waffen". Another time it occured while loading up a default showcase for flight training of Arma 3. Oh and: the first time my system freezed, it was shortly after loading the map, while I was in the map view. I hovered over the "continue" button to start the game, but then I got strange stripes in grey / brown / colored over the whole screen. The other time I also got some kind of a black screen with very slight stripes, like it was some default background of the arma menu.

Edit: I uploaded an Arma 3 Report log, which I created with the launcher. I hope this helps!