495x8.5
vcore - 1.35 (went up to 1.375 during testing)
PLL - 1.5
VTT - 1.34
MCH - 1.40
CPU ref - 0.86 - one notch above or below may help
MCH ref - around 0.87 or so - same for this

These are what I use for 500x9 which is P95 stable. I would urge you to try and tune the CPU/NB clock skews they help a lot. Mine work best at 150/150, but 0/50 work just as well - P95 fails in certain size tests will also give you more info about what you might need to adjust imo. MCH ref is also important, make sure this is tuned - best way is to test and find you own.

The System temperature is just that, just a sensor for the motherboard. No NB temps I'm afraid.