Are you sure you have an i7-4770k ? I have the i7-4770k on a Gigabyte Z87-D3H motherboard.
When installing ESXi 5.1, I am having problems getting past "Initializing IOV" during installation ... it just hangs.
Can you provide more details as to how you disabled UFEI ?
I have disabled most BIOS features to no avail.