While waiting for 270 chipset to become mainstream

Have a Gigabyte H77X UD3H motherboard with (1155) I5. Want to get a 4K monitor attached and need a graphics cards for this. Plan to create a new Hackintosh in the near future when motherboards with the 270 chipsets are available. Idea is to connect this monitor without using extra graphics cards (less noise/power usage).

Usage: browsing, movie watching, editing, terminal stuff. No gaming. No picture manipulation or other heavy lifting.
Need: single 4K@60, silent, low power, cheap. Best to...

While waiting for 270 chipset to become mainstream