Lenovo ThinkPad X200 7458 User Manual page 58

To make sure that the SO-DIMM is installed correctly, do as follows:
1. Turn on the computer.
2. When the ThinkPad logo comes up, immediately press F1 to enter the
3. The "Installed memory" item shows the total amount of memory installed
50
®
ThinkPad X200 Tablet Service and Troubleshooting Guide
BIOS Setup Utility.
in your computer.