I'd be more concerned about a 4-pin on a Z77 Board.
Personally, i'd get this. Solid VRMS and 8-Pin power.
Dispite ASrocks bad rep i have been delighted with my Z87 ASrock board and it has not had any problems dispite it being on 24/7 for over a year.
http://www.amazon.co.uk/Z77-Extreme4-Motherboard-Supports-CrossFireX/dp/B007KTY4A6/ref=sr_1_2?s=computers&ie=UTF8&qid=1413757630&sr=1-2&keywords=z77+motherboard
@Shalashaska