Hi, i'm having this weird problem.. I'm playing Dayz in windowed mode, while running xplit and my computer screen flickered went black, then things that i had opened ; chrome, xplit, arma 2, slowly started to return and it just stops and freezes like that. When that happens i'm forced to restart my computer. This has happened twice to me so far, and happened before formatting my harddrive and reinstalling windows but only ever when i attempted to launch Dota 2.
GPU Radeon HD 5770
CPU I7 860 2.8ghz
not 100% sure on the motherboard or psu and what not.
Download a program that allow you keep track of your GPU temps. I would monitor that first and foremost to see if that is causing the problem. High temps can cause nasty issues. If the temps are in line, then there may be a chance that the GPU itself is bad. I don't suppose you have a spare GPU or a friend's GPU you can throw in there to test, would you?