I just built my first rig a 13x 1050ti with b250 mining mobo. Doing 1.6-2.0 kh/s on nicehash equihash.

I installed all gpus at shop and got drivers installed and all 12 cards were detected. Went back home reassembled and now windows wont go past loading screen it just freezes. Any ideas what could be the issue?
The specs if needed are G4400, asus b250 mining expert, 2 x Antec Gold 750 watt PSU, 12 risers all working and detected by mobo, 120gb ssd, 4gb Ram.