The SSD Review published a review on the ASRock X99 OC Formula ? SSD Performance Differs Slightly With the X99 A quote from the article:

If you are going to introduce a new motherboard to the world, perhaps the best marketing feat one could achieve would be to set a new overclocking world record for that board close to the time of its release. Nick Shih of ASRock did that with the new ASRock X99 OC Formula recently by overclocking the latest Intel i7-5960X chip to a previously unheard of 6620.73 MHz. This is a bold statement in the world of motherboard wars and perhaps a challenge by ASRock, to Gigabyte and Asus, to match that! But then again, maybe Nick figured he had something to prove if he was going to put his signature on this board?

 ASRock X99 OC Formula Review ? SSD Performance Differs Slightly With the X99 @ The SSD Review