Haswell Early Reboot
I removed 1 memory stick, and disable some CPU configurations from bios like Max CPU lock feature.
Then next bootflags worked for me: /haswell GraphicsEnabler=No IGPEnabler=Yes npci=0x3000 ig-platform-id=0x0D220003 PCIRootUID=1
I have installed Yosemite everything works well but it hangs if i put back to place it 4GB again.
Thank's guys problem been in my BIOS becouse i don't know to must off my integrated graphics with procesor , when i turn off her and take a boot flags : /haswell GraphicsEnabler=No -v - worked for me. Instalation Success and my Smile 
Nice Yosemite on my Hackintosh