Does it work when using SPD (1333 MHz 1.5v)?
Are you using XMP when running at 1600 MHz? What voltage is it using?
You may try setting the values manually too or consider updating the BIOS.
Joe, thanks for replying. I´ve already to solve. The pins of the motherboard were slightly crushed, why the processor did not recognize the dual channel, then i carefully arranged them with a pin, and now it´s ok.