I updated my Bios version to 1802 on my working system like a month ago. Adjusted O.C. settings on new bios again with XMP. Everything was working fine. The other day I made a clean installation of windows 7 Ultimate. Before starting the installation, I set bios settings to default. I installed windows and all the drivers including Nvidia driver for GFX card. I did windows updates and than I restarted windows. When I get on desktop, my gfx card started to loose connection. My screen was going black for 2 seconds and than was coming back saying Nvidia driver lost connection... I logged on BIOS settings, I set primary gfx card to PCI-E. Again I had same issue on windows. For sure I know there is a setting that I miss on BIOS for display card but what is it I have no idea. I need help with these settings. I have read many forums, many people have same issue who has the same GFX card as I have.
i7 4770k CPU
Asus Z87 PRO Main Board
16GB RAM (2x4GB Vengeance Pro DD3 1866MHz CL9)
120GB 3.0 Cache SSD Kingston
2TB Caviar Green SATA 3.0 HDD
GTX670 DirectCU II GDDR5 2GB 256Bit Nvidia Geforce GFX Card
X-HAF 942 Coolermaster Case
ThermalTake water 3.0 Extreme
Asus DRW 24x DVD Writer