I just received the core p5 case and having the same problem with the riser cable. Video failing to initialize at power-on, and when it does start, shortly afterwards, it's a BSOD (first time seeing the Windows 10 BSOD). This is my first experience with ThermalTake outside of just the power supply, and it's not a good first impression, especially with hearing that people are waiting weeks to get their 1st, 2nd or 3rd cable.