Open Task Manager
Click the Performance tab
Select Memory
Check the RAM size, speed, and form factor
Open Settings
Go to System
Go to About
Check Installed RAM
On Windows, open System Information
Look for Installed Physical Memory and Total Physical Memory
On macOS, click the Apple menu
Select About This Mac
Check the Memory line
On Linux, open a terminal
Run `free -h`
Run `sudo dmidecode -t memory`
Check the RAM label on the physical module
Note the capacity, speed, type, and manufacturer
Use a hardware info tool if needed
Check the motherboard or laptop manual for supported RAM details