DH87MC + i7-4771

Good evening all,

I've bought a DH87MC and an i7-4771 processor few days ago, I've notice immediatly at the boot that the red led for cpu was flashing ones. I don't know what to think, cause the cpu is in the supported stuff list, the major problem is that I cannot shut down the pc, once stopped boot again. Any idea about that?

Here my hardware:

Intel DH87MC motherbord

Intel i7-4771 Haswell cpu

Corsair Venegance 2x4Gb 1600Mh 1,35v

Seagate 520w bronze

Thanks in advance for any idea!