No Signal after booting logs

That's my first Hackintosh. I have tried installing MacOS High Sierra. After booting logs my monitor loses signal. My CPU doesn't have iGPU.

PC Specs:

CPU - i7 870

GPU - Nvidia GeForce GTX 560 Ti

RAM - 8 GB DDR3 1333 MHz

Storage - 500 GB HDD

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Also, I use DVI-to-VGA. DVI input, VGA output.