Highest Safe Voltage setting for CUSL2?

[WishMaster]

I see alot of people have really high voltage settings on their cpu. Is there anything bad about going high( like 1.8 -1.85) other than it creates more heat? im at 1.75 now, but i can go higher mhz if i bring it up to 1.8 and almost hit 900 at 1.85

 

[MaJik]

more wear?