Lack of support for the VT-d function on some of the -k intel cpu.
The workaround for me was when booting from cd/usb/iso press shift-O and add after the command runweasel noIOMMU then the installation starts normal.
To add noIOMMU to kernelopt of vi /bootbank/boot.cfg
Read mor here i7-4770K Haswell core - ESXi5.1 hang on "initializing IOV"