voltage setings for f3-10666cl9t-3gbnq

[zomb699]

i have set mem to 1333mhz in bios because if i set it to auto it only goes to 1066mhz. when i changed it to 1333mhz the voltage went from 1.5 up to 1.6. i want to know if i can manually set back to 1.5v and still have it at 1333mhz?( and still be stable).
i have :

core i7 920 at stock ( intel turbo-boost and h.t. enabled)
3gb gskill f3-10666cl9t tri-channel
gigabyte EX58-UD5 with latest F4 bios
radeon HD3870X2

i have no complaints, my new system is running great, but id rather have the volts as low as possible.

my second question is about the heat spreader: is there a way to remove the heat-spreaders safely? ( i wish to install thermalright high-tower ram heat-spreaders)

thanks for your help

[G.SKILL]

it could be set to 1.5v without any problems

and as long as the heat spreader is removed, the warranty will be invalid
so, we don't recommend you to remove it
thanks


G.S