Quote Originally Posted by tomcug View Post
Okay, so you need to use those settings:
DRAM Frequency: DDR2-800MHz
Memory Voltage: 2.20V
MCH Chipset Voltage: 1.65V
ICH Chipset Voltage: 1.05V

I think that with those settings you should be stable for sure. Don't forget to set right timings (5-5-5-15-5) too. It would be also good to know what is your CPU.
Ehm... I need 1066MHz: now I have installed a 800MHz kit, so it's ok. But today I have had a new ddr2 kit, running at stock speed of 1066mhz, so I want to try to run this kit at its native speed.
Of course at 800mhz they are stable

P.S.: cpu is E6700