Just built the system, it is unstable with random reboots, came factory with bios F16 updated F18, disabled memory OC switched to xmp, disabled CPU clocking, set to stock. I get random spontaneous reboots, im in the process of memtesting one stick at a time. Unlike my past experience with mobos, mem sockets are rather "loose", they go in way to easy (in comparison to other mobos i worked with, dont know if its normal).
Board: GA-Z77-D3H
CPU: i7 3770k
Memory: Gskill F3-12800CL9Q-16GBZL
GPU: Zotac 660 (nvidia)
PSU: NZXT Hale82 750w
OS: Win8
All new components
Are you experiencing the same issue?.