Lenovo Thinkpad Edge E420 - RAM Upgrade Guide
The Lenovo Edge E420 laptop has two memory slots available for RAM upgrades. It can support a maximum of 8GB of memory. The type of RAM compatible with this model is DDR3 SDRAM, and it uses a small outline dual inline memory module (SODIMM) format. For optimal performance, the recommended RAM speed is 1333MHz, which corresponds to the PC3-10600 standard.
Lenovo Thinkpad Edge E420 Memory Specifications & Maximum RAM Capacity
| Specification | Value |
|---|---|
| Laptop Model | Lenovo Thinkpad Edge E420 |
| 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 E420 RAM
How much RAM can I put in a Lenovo Edge E420?
Maximum is 8GB total. You've got 2 slots, so that's 4GB per slot max. The laptop won't recognize anything bigger than that.
What type of RAM does the E420 use?
It uses DDR3 SDRAM in the SODIMM form factor - that's the smaller laptop-sized sticks, not the full-size desktop ones. Make sure you get SODIMM, not regular DIMM.
What speed RAM should I get for the E420?
1333MHz (also labeled as PC3-10600) is what you want. The system might accept faster RAM like 1600MHz, but it'll just run it at 1333MHz anyway, so no point paying extra.
Can I mix different RAM sizes in the E420?
Yeah, you can mix sizes like 2GB + 4GB to get 6GB total. Just try to match the speed (1333MHz) if possible. Mixing speeds works but everything runs at the slower speed.
Do I need to upgrade both RAM slots at once?
Nope, you can upgrade one slot at a time. If you've got 2GB now, just add another 2GB or 4GB stick in the empty slot. Or replace what's there with bigger sticks.