Lenovo Thinkpad Edge E420s - RAM Upgrade Guide
The Lenovo Edge E420s laptop can be upgraded to improve its memory performance. It has two memory slots available for RAM upgrades, allowing a maximum capacity of 8GB. The type of memory supported is DDR3 SDRAM, and it uses a SODIMM form factor, which is a compact design commonly used in laptops. For optimal performance, the recommended RAM clock speed is 1333MHz, often labeled as PC3-10600.
Lenovo Thinkpad Edge E420s Memory Specifications & Maximum RAM Capacity
| Specification | Value |
|---|---|
| Laptop Model | Lenovo Thinkpad Edge E420s |
| Total memory slots | 2 |
| Maximum RAM | 8GB |
| Memory type | DDR3 SDRAM |
| Form factor | SODIMM (Small Outline Dual Inline Memory Module) |
| Recommended RAM clock speed | 1333MHz (PC3-10600) |
| Voltage | 1.35V - 1.5V |
| Number of pins | 204-pin |
FAQ about Lenovo Thinkpad Edge E420s RAM
What's the maximum RAM I can put in my Lenovo Edge E420s?
You can go up to 8GB total. The laptop has 2 memory slots, so that's typically 2x4GB sticks to max it out.
What type of memory does the E420s use?
It uses DDR3 SODIMM modules - those are the smaller laptop-sized memory sticks, not the full-size desktop ones. Make sure you get SODIMM specifically.
What speed RAM should I get for the E420s?
Look for 1333MHz DDR3, also labeled as PC3-10600. The system might accept faster RAM but it'll just run at 1333MHz anyway, so no point paying extra for faster speeds.
Can I mix different RAM sizes in the two slots?
Technically yes, like 2GB + 4GB for 6GB total, but matching pairs (like 4GB + 4GB) usually work better for stability and performance. If you're upgrading, matching sizes is the safer bet.
Do I need to remove the existing RAM when upgrading?
Depends what's already in there. If you've got 2x2GB and want 8GB total, you'll need to replace both sticks with 4GB ones. Check what you have first - sometimes there's only one stick installed, leaving a slot free.