Comes with 4 gb of memory is a little small, beginning with a 8 gb of memory, specifications for 1600 MHZ DDR3L 1.35 v low voltage, power off and unplug t450 ac power, battery power supply, restart and follow the "F1", enter the BIOS, choose "config" - & gt;" Power ", then choose "Disable Build - in '", press" enter ", select "Yes", t450 will immediately shut down, down the back cover is very simple, 8 screws loosen, including external Battery under the one, don't have to completely turn off, to ensure that the screw from the hole out of the can, use plastic lever or CARDS from behind the Battery slot aperture place start pry, as shown in figure,

Can choose according to pry feedback to determine different direction and strength of pry open card buckle can hear any sound, along the pry open gap, in turn, pry open the back cover, finally sending back cover in the direction of the battery slot, the rear cover can be removed, the whole process is relatively easy, do not need to use brute force, who said the back cover is hard to open, is forcibly Angle and position is not suitable, constantly trying, will find the feeling,

Figure in the yellow box position is memory chips,

To avoid static electricity, with a lever or other insulated tools to push outside memory bank card buckle outward, memory chips can pop up, when installed, the memory card on the bottom, according to the can lock down,

Installed don't tighten the back cover, boot memory installed is verified, normal recognition to the rear cover tight, congrats,