Computer restarts when USB install is almost done, MacOS Installer shows in boot menu.

So about 12 mins remaining on the USB installer it restarts my PC (can't see the verbose text because it's too quick) then if I try to go into OpenCore USB boot menu, the entry MacOS Installer (SSD) does show but when I go to boot from it, my PC restarts after about 12 lines of output.

i5-4670k, using the 4600 iGPU, followed the OpenCore config.plist guide for Haswell.