G1.Sniper M5 random restarts

[sarandinga2]

Hello. Excuse my english!.

I bought a e new mother G1.Sniper m5 and a new processor i7 4770K. I updated my PC with this new hard and installed Win 8.1 PRO.

Now, I am having random restarts. Till now I have only had restarts when playing games. Today I had 1 in Windows.

Last Monday I change my PSU. I bought a Thermaltake Smart M850w, but restarts continous.

I am monitoring the system with the soft MSI Afterburner and temperatures and voltages, seems all OK.

Now I am trying without XMP to allow RAM work at 1.5v 1600MHz instead of 1.65v 2400MHz.

What could be my problem?.

Thanks in advanced.

[sarandinga2]

I want to add some information. One person of another forum, recomended me to try setting the RAM whitout the XMP option.

With XMP, the memory works at 2400MHz and 1.650v. Without XMP, it works at 1600MHz and 1.5v.

Since I set without XMP, I didn't have any restart event.

My memories are 2 x G.Skill RipjawsZ F3-2400C10D-8GZH 8GB DDR3 2400Mhz. In the web page, says to be compatible with G1.Sniper 5. I suppose to be with G1.Sniper M5 too, becase they are almost equal.

Memories's Web page: http://www.gskill.com/en/product/f3-2400c10d-8gzh go to QVL, Gigabyte, Z87. The first one says G1.Sniper 5.