Hello Guys, I'm with that problem, I installed GTA IV today, and When i'm playing then screen stand refreshing with a black screen and then comes back, i'm very pissed about this, I thought was overclocking settings but I went to BIOS and let the BIOS stock config, I don't know what to do now. Please anyone could explain what that happens ? FX-4100 3.6GHz@3.8 Boost 4GB RAM DDR3 1333 MHz GA-78LMT-S2P REV 5.0, updated bios PSU : Corsair CX430 V2 HD Samsung 500GB DVD RW+/R Sony Windows 7 Ultimate X64 GPU PCI-E : HD 6770 GPU Onboard : HD 3000 One more thing, my graphics is in a little Overclock, and my Onboard graphics is activated too Seems the driver get desactivated and then get activated again. It's weird. Sorry about my english i'm not a native speaker.