Lenovo G400s - RAM Upgrade Guide
The Lenovo G400s laptop has two slots available for memory upgrades, allowing for a maximum of 16GB of RAM. It uses DDR3 SDRAM, which comes in the SODIMM format, designed specifically for laptops due to its compact size. For optimal performance, the recommended RAM clock speed is 1600MHz, also referred to as PC3-12800.
Lenovo G400s Memory Specifications & Maximum RAM Capacity
| Specification | Value |
|---|---|
| Laptop Model | Lenovo G400s |
| Total memory slots | 2 |
| Maximum RAM | 16GB |
| Memory type | DDR3 SDRAM |
| Form factor | SODIMM (Small Outline Dual Inline Memory Module) |
| Recommended RAM clock speed | 1600MHz (PC3-12800) |
| Voltage | Low - 1.35V (DDR3L / PC3L) |
| Number of pins | 204-pin |
FAQ about Lenovo G400s RAM
How much RAM can I put in my Lenovo G400s laptop?
You can install up to 16GB total. The laptop has 2 memory slots, so you could do 2x8GB sticks for the maximum.
What type of RAM does the G400s use?
It uses DDR3 SODIMM modules - those are the smaller laptop memory sticks, not the full-size desktop ones. Make sure you get DDR3, not DDR4 or DDR5.
What speed RAM should I get for the G400s?
1600MHz (also labeled as PC3-12800) is the recommended speed. You might be able to use 1333MHz if that's what you have lying around, but 1600MHz is what works best.
Can I mix different RAM sizes in the G400s?
Technically yes - like 4GB in one slot and 8GB in the other - but it's better to use matching pairs. Two identical sticks will run in dual-channel mode which gives better performance.
Do I need to remove the old RAM when upgrading?
Depends what you have now. If you've got one 4GB stick and want 8GB total, you could just add another 4GB. But if you're going for 16GB, you'll probably need to replace whatever's in there with 2x8GB sticks.