Black Screen during gaming, PLEASE HELP

So, I've been having this problem for a really, really long time. Whenever I game, typically in Dota 2 or any multiplayer game (bit it's happened in single player games as well) out of nowhere my game will freeze, my screen will go black, then my desktop will appear, but I can still hear the game in the background and use the cursor in-game even though I can't see the actual game. It says the display driver has failed, however, I've gone through 3 different video cards with this issue, so If ind it hard to believe that it is a graphics card issue. The only way to "solve" the problem is to end task my game and reboot, but lately it just leads to more frequent black screen crashes and a lot of frustration. Please, please help me.

My specs:
Intel Core i3-3225 Ivy Bridge 3.3GHz LGA 1155
XIGMATEK LOKI SD963 92mm HYPRO Bearing CPU
MSI Z77A-G43 Gaming LGA 1155 Intel Z77 HDMI SATA 6Gb/s USB 3.0 ATX Intel Motherboard
Patriot Gamer Series 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model PGS34G1600ELK
MSI R7850 PE 2GD5/OC Radeon HD 7850 (gfx card)
Kingston HyperX 3k 120gb SSD
WD Caviar Blue 160GB HDD
Samsung Syncmaster P2050 (monitor)
Coolermaster RS-600-PCAR-E3 600W power supply
Antec900 Black case