Computer keeps cycling off and on

Load defaults on the bios screen, save and exit, reboot. see if it recognizes your newly installed ram. also if you have 4 memory slots, try using different configuration on the placement of the ram modules. Like if you have four memory slots trying, try using the first and 2nd slot, if no go then try using the 1st and 3rd slot and also remember to always load bios deafaults everytime you reconfigure the ram placement or size.