How did you install Windows without the display working?

There are some folk that move a HDD over with a Windows installed and the fun begins. Anyhow that is not supported.

I did check the CPU and it has onboard graphics.
http://ark.intel.com/products/88191/Intel-Core-i5-6600K-Processor-6M-Cache-up-to-3_90-GHz

And this is the UEFI BIOS so getting to the BIOS is not easy. http://www.gigabyte.com/support-downloads/faq-page.aspx?fid=2739&pid=5530 means I might have to unplug the HDD/SSD/ODD to force it to show up.