Here, try this for me.
Boot into BIOs and save your current configuration to CMOS. Then..
-Set your multiplier to 4.5Ghz
-Disable "Real-Time Changes in OS"
-Disable C1E/C3 states
-Disable Temp Monitor
-Manually set your vcore (Voltage) to 1.315
-Set LLC (Aka Load-Line Calibration) to level 6
-PLL Set to 1.7 instead of 1.8
Boot with those settings and stress test that specific configuration and see how it goes. If you BSOD because of x124 or x101 then just bump up the vcore by 0.05!
Once stressing with those settings, lmk what your Idle, and Load voltage is at.
Yes, your voltage in Windows WILL be higher! DO NOT panic, that is normal! This should help you lower your vcore and keep your vcore at a more controlled standpoint and help with temps a bit (If their even an issue.)
EDIT - Also, if it is stable, then you can start decreasing your vcore down by 0.05 until it becomes unstable. Forgot to add that part, sorry. Edited by Dustin1 - 10/15/11 at 12:19pm