Compatibility DDR3/Core i7 920

Intel said that the core i7 (920) supports DDR3 800/1066 MHz but manufacturers put on the market kits clocked in 1333/1600 Mhz .. wanted to know if we can actually use them without problems and how ensure that the RAM voltage does not exceed 1.65 volts (which can cause damage to the processor)?
thank you :thumbup1:

yes, no problem, you just see if the motherboard accepts the ram ;-)

Thank you, and to ensure that the voltage does exceed as 1.65 volt ?is already set in the configuration of the motherboard or processor?