Open Task Manager
Go to the Performance tab
Click Memory
Check the Speed value
Open System Information
Search for System Information
Open it
Go to Components > Memory
Check the Speed value
Use Command Prompt
Open Command Prompt
Run `wmic memorychip get speed`
Use PowerShell
Open PowerShell
Run `Get-CimInstance Win32_PhysicalMemory | Select-Object Speed`
Check BIOS or UEFI
Restart the computer
Enter BIOS or UEFI setup
Look for memory or RAM information
Use third-party tools
Install CPU-Z
Open the Memory tab
Check the DRAM Frequency value
Multiply the DRAM Frequency by 2 for DDR RAM