E1200 ultra-3.06G memory to the 667 it normal?

Gigabyte motherboard p35dsp 1.1 version is also super-
bottleneck is my cpu or memory? My memory to increase the voltage to 386 super-time access to the system on the stable operation of 385!
feel too much memory should not be a change in Article 800 of the memory overclocking what brand is better?

general of the ultra-DDR667 400 frequency no problem now?