Check the laptop label on the bottom or inside the battery compartment
Open System Information on Windows
Open Settings > System > About on Windows
Open Task Manager > Performance on Windows
Use DirectX Diagnostic Tool by typing dxdiag in Run
Open Device Manager on Windows
Check About This Mac on macOS
Click the Apple menu > About This Mac
Use System Report on macOS
Use terminal commands like systeminfo on Windows or uname -a on Linux
Check BIOS or UEFI setup
Use the manufacturer’s support website with the serial number
Use third-party tools like CPU-Z, Speccy, or HWiNFO
Check the original box or purchase receipt
Look up the model number online
Open the laptop and check internal component labels if needed