I would return or exchange it for lower voltage RAM. But, if you choose not to do so, then you may have to enter the BIOS (using only one stick of the RAM) to:
-- verify or adjust the RAM voltage to 1.5v,
-- adjust the RAM speed to 1333MHz.
Save and exit BIOS. Shut down the computer and disconnect the power cord from the surge supressor wor supply outlet.
Firmly seat the second stick of RAM.
Re-connect the power cord. Power-on the computer.
If you still can't boot to the OS, go back into the BIOS and increase the RAM latency timings from 8-8-8-24 to say, 9-9-9-30.