How can I find maximum amount of ram supported by my laptop

Dear anand kumar mortha,

Thank you for reaching out to the Microsoft Q&A.

Based on the official Dell specifications for your Dell Latitude 3420, we can find some information:

• Maximum Supported RAM: 32 GB
• RAM Slots: 2 SODIMM slots

Can you use 2 x 32 GB (64 GB)? The answer is No. The laptop's motherboard and firmware limit the maximum memory to 32 GB. While the 11th Gen Intel processor in your laptop might technically support 64 GB, Dell has limited the maximum configuration for this specific model.

To find maximum RAM, you can try following these methods:

1. Check the Official Dell Service Manual:
   • You can access Latitude 3420 Setup and Specifications | Dell US
   • This method is the most accurate as it's the official data for your specific model
   Disclaimer: This is a non-Microsoft website. The page appears to be providing accurate and safe information. Watch out for ads on the site that may advertise products frequently classified as PUP (Potential Unwanted Products). Thoroughly research any product advertised on the site before your device to download and install it. 
2. Use Windows Command Prompt:
   • Go to Start, type "cmd"
   • Right-click Command Prompt > Run as administrator
   • Run this command: wmic memphysical get MaxCapacity, MemoryDevices
   • MemoryDevices: This will show 2, confirming you have two physical RAM slots.
   • MaxCapacity: This shows the maximum capacity in kilobytes. To convert it to gigabytes (GB), you divide the number by 1,048,576 (or 1024x1024). For your laptop, it will likely show 33554432, which equals 32 GB. Note: On some systems, this command can be misleading and show the CPU's theoretical maximum (e.g., 64 GB) instead of the motherboard's actual limit.

To upgrade your Dell Latitude 3420, you should purchase a kit of two 16 GB DDR4 3200 MHz SODIMM RAM sticks. This will give you the maximum supported 32 GB and will allow the system to run in "dual-channel" mode, which offers better performance than using a single RAM stick.

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Best regards, 

Bryan Vu | Microsoft Q&A Support Specialist