What kind of memory are you using?
I'm using a Corsair DDR3 Memory kit : CMP16GX3M4A1333C9
Seems it's non-ECC DIMM. The board requires ECC DIMMs. See the Tested memory and hardware list for supported DIMMs. But ignore the Registered DIMMs in the list - the board supports unbuffered DIMMs only.
I will check with others DIMMs modules
I get some new ECC DIMMs and it work fine
thanks a lot