if you want to go any higher than 3.6ghz you will need an aftermarket cooler like the Zalman 9700
your CPU Host Frequency (cpu clock) should be at 400 x multiplier of 9 = 3600
you ram SPD (ram divider) should be set at "2"
your ram voltage is fine
you should not need to increase your cpu voltage to run at 3.6 ghz
give us a screeshot from all tabs within cpu-z
http://www.cpuid.com/cpuz.php
how many case fans do you have / where is each located in the box / which direction does each one move air ???? and what size is each fan ?
looks like your cooling needs to be improved
use this program to monitor cpu temps
http://www.alcpu.com/CoreTemp/