Lenovo IdeaPad S540-15IWL - RAM Upgrade Guide
The Lenovo S540-15IWL laptop has a single memory slot for RAM upgrades. It can support a maximum of 20GB of memory, with up to 16GB available in the user-accessible slot. The type of memory used is DDR4 SDRAM, and it comes in a SODIMM format, which is a compact design commonly used in laptops. For optimal performance, the recommended RAM clock speed is 2666MHz, also referred to as PC4-21300.
Lenovo IdeaPad S540-15IWL Memory Specifications & Maximum RAM Capacity
| Specification | Value |
|---|---|
| Laptop Model | Lenovo IdeaPad S540-15IWL |
| Total memory slots | 1 |
| Maximum RAM | 20GB (up to 16GB in user accessible slot) |
| Memory type | DDR4 SDRAM |
| Form factor | SODIMM (Small Outline Dual Inline Memory Module) |
| Recommended RAM clock speed | 2666MHz (PC4-21300) |
| Voltage | Low - 1.2V |
| Number of pins | 260-pin |
FAQ about Lenovo IdeaPad S540-15IWL RAM
How many RAM slots does my S540-15IWL have?
Just one slot that you can access. There's actually some memory soldered to the motherboard that you can't change, but you get one slot to work with for upgrades.
What's the maximum RAM I can have in total?
20GB total. That's because there's 4GB soldered on the motherboard that you can't touch, plus you can add up to 16GB in the open slot.
What type of RAM do I need to buy?
You need DDR4 SODIMM - that's the smaller laptop memory, not the big desktop sticks. Make sure it's DDR4, not DDR3 or DDR5.
What speed RAM should I get?
2666MHz is what's recommended. You might see it listed as PC4-21300 - same thing. You could technically use faster RAM but it'll just run at 2666MHz anyway.
Can I upgrade to 32GB?
No, the single slot maxes out at 16GB. With the 4GB soldered memory, you're stuck at 20GB maximum.
Will any DDR4 laptop memory work?
As long as it's DDR4 SODIMM and 16GB or less per stick, you should be fine. Just stick with 2666MHz to avoid any compatibility issues.