I would like to know which one is the correct voltage for upgrading the RAM of a DELL E6410, 1.35V or 1.5V? The E6410 Service Manual refers only to the type of SDRAM (DDR3 1066 MHz) but not the voltage. I have found contrasting opinions on the Web.

Which couple of DDR3 1066 MHz SODIMM SDRAM should I buy, 1.35V or 1.5V?