Hello i have an i7 950 overclocked to 4.0 using 20 multiplier with base clock 200. I have a venemous x black with diamond thermal paste and two r4 cooler master "90cfm" fans. I primed my system for 6 hours temps never went above 73 c on any core in a 76 degree f room. I am wondering if this is a safe overclock or should i replace my cooler with a more powerful cooler such as a d 14 or silver arrow? any input is appreciated