How to Check RAM Speed in Windows and BIOS/UEFI

Updated 5 November 2026 · Standard formula, shown below

Checking RAM speed shows the rate your memory is currently running, which can help confirm an upgrade or diagnose performance issues. You can view it in Windows or in BIOS/UEFI; have your computer running and, if you plan to use firmware, know how to enter setup for your device.

What You’ll Need

A Windows PC for the built-in Windows checks.
For the BIOS/UEFI method, access to the computer’s setup screen. Save your work first because the PC will restart.
Optional: your computer or motherboard manual if you need the correct startup key or want to identify a memory profile setting.

Step-by-Step

Check the speed in Task Manager. Press Ctrl+Shift+Esc to open Task Manager. If it opens in a compact view, select More details. Choose Performance, then Memory. Look for Speed. Windows reports the memory’s current operating data rate, usually in MT/s, though some Windows versions or system tools label it MHz. Task Manager may also show the number of slots used and the form factor.
Note what the number represents. Write down the displayed value and its unit. For example, a reading of 3200 MT/s means 3,200 million transfers per second. DDR memory transfers data twice per clock cycle, so software and firmware sometimes show an effective rate as “MHz” even though MT/s is the more precise unit. Do not treat the reported figure as a guaranteed maximum speed for every workload.
Check Windows System Information if useful. Press Windows+R, enter msinfo32, and press Enter. The System Summary includes hardware details, but it may not report the current RAM speed on every computer. Use Task Manager as the first Windows check; do not assume a missing speed means the memory is faulty.
Restart and open BIOS/UEFI. Save open files, then restart the computer. As it starts, repeatedly press the setup key shown on screen or in the manual. Common keys include Delete, F2, or, on some systems, Esc or F10. Alternatively, in Windows 11 go to Settings > System > Recovery > Advanced startup > Restart now. In Windows 10, use Settings > Update & Security > Recovery > Advanced startup > Restart now. Then choose Troubleshoot > Advanced options > UEFI Firmware Settings > Restart, if that option is available.
Find the memory information. BIOS/UEFI layouts vary. Look on the main or information page, or under headings such as Memory, DRAM Status, Overclocking, or Advanced Memory Settings. Find a current or configured memory speed. Some firmware shows each module’s detected profile separately from the speed currently applied; use the current operating or memory-frequency value when checking what the system is running now.
Exit without changing settings. If you only wanted to inspect the speed, choose the option to exit and discard changes, often called Discard Changes and Exit or Exit Without Saving. Avoid changing voltage, timings, or a memory profile just to view the reading. After Windows starts, you can compare the BIOS figure with Task Manager; small differences in labels or displayed units can be normal.
Compare the result with the memory’s rated speed. Check the RAM packaging, module label, or manufacturer specifications, and verify that your processor and motherboard support that rate. A kit’s advertised speed may require enabling an optional memory profile in BIOS/UEFI; it is not necessarily the default speed. If the current reading is lower, investigate before changing settings.

Common Mistakes

Confusing MT/s with MHz: DDR’s effective transfer rate and physical clock are not the same. A displayed “3200 MHz” may be a casual label for 3200 MT/s; do not halve or double figures unless you know which measurement the tool reports.
Reading the rated speed as the current speed: A module can advertise a profile that is not active. Compare the current operating value, not just a profile name or maximum specification.
Assuming every BIOS uses the same menu names: Firmware differs by computer and motherboard. Search its memory-related pages rather than following a menu path intended for another model.
Changing settings while checking: Selecting a profile or adjusting frequency can affect stability. Record the existing value and leave settings unchanged if you only need to inspect them.

Tips

Use Task Manager for a quick check and BIOS/UEFI when Windows does not show a value or you need to distinguish a current speed from a stored profile.
Check both the reported speed and the number of memory modules. Two compatible modules in the recommended slots can enable dual-channel operation, but channel mode is separate from speed.
For a meaningful comparison, note the computer model, RAM configuration, and the exact unit shown. A system’s maximum supported rate can depend on its processor, motherboard, module count, and memory configuration.

Troubleshooting

Task Manager has no Speed field: Make sure you selected Performance > Memory, not a process list. Restart Windows and check for system updates. If the field remains absent, consult the PC maker’s documentation or use BIOS/UEFI; available details can vary by hardware and driver support.
The BIOS/UEFI key does not work: Start pressing the key as soon as the computer powers on, not after Windows appears. Try the key specified in the manual. If startup is too fast, use Windows Advanced startup and select UEFI Firmware Settings when available. Some systems do not expose that option.
You cannot find a speed reading in firmware: Check the information or memory-status pages and the manual. Firmware may show a memory clock rather than an effective DDR rate, or may display only a profile. Do not change a setting based on an uncertain interpretation.
The reading is below the kit’s advertised rate: The default profile may be slower, or the processor and board may limit the supported rate. Confirm the exact RAM specification and system support. If you decide to enable a supported profile, follow the computer or motherboard instructions, change one setting at a time, and restore defaults if the PC becomes unstable or fails to start.
Windows and firmware show different figures: Check that both readings refer to current speed and compare their units. Some tools round values or label MT/s as MHz. If the difference is substantial, restart and check again, then consult the device documentation or a reputable hardware-information utility.

Frequently Asked Questions

Is RAM speed shown in Task Manager accurate?
It is a convenient reading of the speed Windows detects. Firmware or hardware tools may use different labels or rounding, so compare units and whether the value is current or rated.

What is the difference between MHz and MT/s?
MHz measures clock cycles per second; MT/s measures transfers per second. DDR memory transfers data twice per clock cycle, which is why an effective rate may be about twice the underlying clock.

Why is my RAM running slower than its label?
The system may be using its default memory setting, or a processor, motherboard, or module configuration may limit the rate. A higher advertised profile may need to be enabled and may not be supported in every setup.

Can I check RAM speed without entering BIOS?
Usually. Open Task Manager with Ctrl+Shift+Esc, then select Performance > Memory and look for Speed.

Does faster RAM always make a PC faster?
No. The effect depends on the processor, workload, memory configuration, and other system limits. A speed number alone does not establish how much performance a computer will gain.

Is it safe to enable a memory profile?
A profile applies settings intended for compatible hardware, but stability is not guaranteed for every system. Check support first, avoid changing voltage or timings without a clear reason, and know how to restore BIOS/UEFI defaults.

Method: the standard formula for this calculation, rounded as each result states. See how the calculators work or report an error.