Dumb question, but my ancient Lenovo laptop (8 years old, and counting!) has two slots for SODimms, so I really want to update it. It's a basic Celeron M, running at 1.50 Ghz. I'm doing nothing fancy with this - just a college/uni computer - basically running libreoffice and Foxit to get my work done. How do I find out the memory speed and rates? (This laptop has easy access to the memory modules - just pop off the back plate with a screwdriver.) Thanks - oh, and any suggestions that I replace my laptop with something newer will be ignored!