Asus X409JP - RAM Upgrade Guide

The Asus X409JP laptop has two memory slots for RAM, but only one of them can be upgraded by the user. The maximum amount of memory the laptop can support is 20GB, with up to 16GB available in the slot that can be accessed for upgrades. It uses DDR4 SDRAM as the type of memory, which comes in a small outline dual inline memory module (SODIMM) format. For best performance, the recommended clock speed for the RAM is 2666MHz, also referred to as PC4-21300.
Asus X409JP Memory Specifications & Maximum RAM Capacity
| Specification | Value |
|---|---|
| Laptop Model | Asus X409JP |
| Total memory slots | 2 (1 not upgradeable) |
| 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 Asus X409JP RAM
How much RAM can I add to this laptop?
You can add up to 16GB in the single accessible slot. The laptop has 4GB soldered that can't be changed, so maximum total is 20GB.
What type of RAM do I need to buy?
You need DDR4 SODIMM memory - the smaller laptop-sized modules, not the bigger desktop ones. Look for 2666MHz speed.
Can I upgrade both memory slots?
No, only one slot is accessible for upgrades. The other has memory permanently attached to the motherboard.
Will faster RAM like 3200MHz work?
It'll probably work but will run at 2666MHz anyway. Save money and just get 2666MHz since that's what the system supports.
Is it worth maxing out to 20GB total?
Depends what you're doing. For regular use, 12GB total (4GB built-in + 8GB upgrade) is usually plenty. Heavy multitasking or creative work benefits from the full 20GB.