Brought from assembler 2 days back. Already cannot boot up. Shows memory error. Memory as per Intel compatibility list. Many have same problem as seen on Intel forums.
Config as follows
Intel DZ77BH 55K
i7 3770k
2 x 4 GB Corsair Vengeance 1600 mhz
Asus Geforce 650 2GDD5

Even using Bios recovery does not solve problem.
As per Intel Forums same issue has been plaguing this from the begining. Till datte Feb 2013 nothing has been done to sort out thre problem