Today decided to update from Win8 Pro to Win8.1. Everything was fine with enabled 3 monitors (Extended mode, not Eyefinity) at the same time. But after update can't enable 3d monitor, only 2 could be enabled at the same time. Did current things before write question here: Remove all drivers, reboots, re-installs Different cable input's and orders of enabling Tried to enable each monitor from Catalyst and Windows Screen Resolution Spec's: Windows 8.1 Pro XFX HD7970 3 of LG E2442 Cables: 2 DVI 1 HDMI Googled for many time and found one of possible solution is to buy ACTIVE mini DisplayPort to DVI/HDMI, but maybe there are some another more simple solutions?