freezing issues

I just completed my Hackintosh build but for some reason after 2 plus hours of usage it freezes and ill have to reboot my system no matter what hopefully someone with a similar issue can maybe help me with this issue

I have a gigabyte GA-P67-UD3-B3 mobo

gtx 650

as well as a gtx 950 for the windows side of things

12 gigs of ram

thank you for the help!