P5N32-SLI Premium, RAM on Dual Channel Crashes, Please Help

[xiao]

I have two RAM Sticks every time I put them in the dual channel configuration, my computer crashes in windows at random times all under10 minutes. However it works fine in when it is not set in dual channel mode. I wish to used dual channel, and when I bought a third RAM stick, the motherboard detected as dual channel, and it crashed in windows, so I am not able to use more than two ram sticks, or just two ram sticks in dual channel mode.

However it works fine in non dual channel mode

Motherboard: P5N32-SLI Premium
RAM: Nanya M2Y1G64TU8HB0B-25C
800MHz 240Pin PC6400 DDR2 SDRAM DIMM 1.8V

I have done the following
main settings. Set them maually to:
5-5-5-12 (CAS-TRCD-TRP-TRAS) 2T. Also set you memory voltage to 2.1 volts.

it didnt work

i even reseted the CMOS

[Able]

Unless the ram sticks are absolutely identical then dual channel is prone to crashing the system.