I am thinking of buying the Gigabyte Z77X-UP5 TH, but from this test http://www.tomshardware.com/reviews/z77x-up5-th-z77a-gd80-z77-oc-formula,3305-24.html I see that it has no PCH voltage overclocking. It went on to win the competition in the review, but I was wondering how important that feature is. Thank you.