I have my i5 4670K currentlyoverclocked to 4.4ghz at a 1.23 voltage. When stress testing with aida64 the maximum temp my cores reach is 75C and they average 65C during the test. Is this safe? Can I game without being worried with these numbers? My heatsink is a Noctua NH-D14, and my motherboard is an Asus Sabertooth Z97.