4.5ghz settings for 2700K on GA-Z68XP-UD5

Hello all

i am currently running these settings:

multiplier at 45
vcore at 1.3v
PLL overvoltage enabled
PLL voltage at one notch over the stock 1.8 (can't remember what it is exactly)
QPI voltage at one notch over stock (also can't remember)
DIMM voltage at 1.54 (i'm running 16gb of ram at 1866mhz, figured it wouldn't hurt)
load line calibration level 7
EIST and all power savings are enabled
cooler is a noctua nh-d14

The awesome thing about these settings is that the CPU idles at 1600mhz at a chilly 32 degrees (truely amazing over previous X58 build) and loads at 4500mhz at around 65 degrees. I have stress tested this with the most recent version of prime95 for 4 hours without any issues. My problem is this. I have tested the vcore to be stable at below 1.3v but when i do lower it i sometimes get BSODs on light usage which indicates that the LLC could be higher and i don't want to raise it too much. I've heard about voltage offsets that are now possible with sandy bridge that is a good alternative to using LLC. Could anyone please elaborate on how i could tweak these settings to not require LLC and be able to lower my vcore?

Thanks!