How to check RAM size, speed, and model in Windows
You can check how much RAM your PC has in a few seconds, but finding its speed, exact model, part number, and stick configuration takes more digging. These are the quickest reliable methods in Windows 11 and Windows 10.
Check RAM with Task Manager
Task Manager is the quickest way to check RAM without installing anything. It shows the total installed capacity, configured speed, form factor, slots used, cached memory, and hardware-reserved memory.
Start here when you need to know how much RAM is installed and whether it appears to be running at the expected speed.
- Press Ctrl + Shift + Esc to open Task Manager.
- Select Performance, then choose Memory.
- Check the total capacity in the upper-right corner.
- Read the speed and slots-used values near the bottom.
Check the exact RAM model with PowerShell
Task Manager usually does not show the manufacturer or exact module part number. PowerShell can query each physical memory stick separately when the motherboard firmware exposes that information.
Open PowerShell or Windows Terminal and run the command below. Each result represents one installed module.
Get-CimInstance Win32_PhysicalMemory | Select-Object Manufacturer, PartNumber, DeviceLocator, @{Name='SizeGB';Expression={[math]::Round($_.Capacity / 1GB)}}, Speed, ConfiguredClockSpeedInstalled RAM versus usable RAM
Windows may show slightly less usable memory than the amount physically installed. Some memory is reserved for hardware, firmware, or integrated graphics.
A small difference is normal. If several gigabytes are unexpectedly unavailable, check Task Manager's hardware-reserved value and confirm every module appears.
Understand RAM speed, MHz, and MT/s
RAM kits are advertised with effective data rates such as DDR4-3200 or DDR5-6000. Depending on the Windows version and reporting method, the value may be labeled MHz or MT/s.
A DDR5-6000 kit running around 4800 may be using its default profile because XMP or EXPO is disabled. CPU and motherboard limits can also affect the final speed.
Check how many RAM sticks and slots you use
Task Manager shows a slots-used value such as 2 of 4. The PowerShell command above provides one row per module and includes its DeviceLocator.
Knowing the stick count matters before upgrading. Two 16 GB modules and four 8 GB modules both total 32 GB, but they leave different upgrade options.
What to do if your RAM speed looks wrong
Compare the configured speed against the rating printed on the kit or listed for its exact part number. If it is substantially lower, restart into the BIOS and check whether the memory profile is enabled.
Intel systems commonly call the profile XMP, while AMD platforms may use EXPO. Only select a profile supported by your memory, processor, and motherboard.
Check RAM automatically with PC Dyno
PC Dyno collects the capacity, configured speed, module count, manufacturer, and exact part number Windows exposes. It keeps those details in one shareable report alongside the CPU, GPU, motherboard, and storage.
Exact part numbers distinguish between kits that share the same capacity and speed, making hardware identification and conservative price matching more reliable.