How to Check Processor (CPU) Cache Memory in Windows 10

If you ever wonder how to check the Processor (CPU) L2 and L3 cache memory size on your Windows 10 or 8.1 computer, this small guide would be helpful. Cache Level (L1, L2, L3) memory in the computer processor (CPU – Central Processing Unit) helps the computer system to keep the data inside processor memory rather than normal RAM. The more L2, L3 cache memory processor has, the faster it can work because it doesn’t need to go and access the data such as Operating System files, and working programs’ binaries which need frequent and faster access from the normal RAM. In this way your computer can give better output by using the internal cache memory from CPU.

Though L1 cache is not available (or not important) in recent processors, the L2 and L3 cache memories are very important. It’s always better to buy a desktop or laptop computer with a processor which is having higher L3 cache memory. Of course, the more L3 cache will cost more money while selecting the processor.

This guide shows you how to check the processor (CPU) cache size without rebooting your Windows 10 computer.  Though it can be easily checked in BIOS  while booting the computer, here we list out few methods about how to check the processor cache memory inside Operating Systems without rebooting the computer.

How to Check L2, L3 Cache Size on Windows 10

Step-1 (Command Prompt)

Simply it can be done by built-in Windows command line tool wmic from Windows 10 command prompt. Search for ‘cmd’ in Windows 10 search and select the command prompt and type below command.

wmic cpu get L2CacheSize, L3CacheSize

It will return the following message.check processor cache size on Windows 10

As indicated above, my PC processor is having 8MB L3 and 1MB L2 Cache.

Step-2 (System Information)

Find the processor model and search on Google (mostly from processor vendors like Intel or AMD).

To find the exact processor model on your Windows 10 or Windows 8.1 computer, you can look for ‘System Information’ in search. On the detailed system information panel, you can identify the model of the processor (look for the model number).find exact processor model on Windows 10

As shown above, once I searched for more details about Intel i7 4790 on internet, I landed on below information from Intel website that shows the L3 cache memory.

Intel L3 cache from Windows 10 PC

Step–3 (Intel Utility)

By CPU-Z that can give more information!

CPU-Z is a small and excellent utility that can give maximum details of your computer processor, motherboard and RAM. In processor details, you can easily find out the L2 and L3 cache size from Windows 10/8.1 OS. This tool can say about virtualization technology (VT-x) and other features of the processor.

You can download the CPU-Z for Windows OS from this link.

Once you open the program, it will collect the details of the hardware and provide the information as below.L3 cache by CPU-Z on Windows 10

It clearly shows the CPU cache size in the CPU screen. To get more information about it, you can select the ‘Caches’ tab.

I hope this small guide can give useful tips on how to find the processor CPU’s cache memory in Windows 10/8.1 without rebooting the computer to enter BIOS. Do let me know if you find any more easy steps to get this CPU information.

Dinesh is the founder of Sysprobs and written more than 400 articles. Enthusiast in Microsoft and cloud technologies with more than 15 years of IT experience.

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