Asus X509FJ - RAM Upgrade Guide
The Asus X509FJ laptop has a single memory slot available for RAM upgrades. It can support a maximum of 20GB of memory, with up to 16GB accessible through the user-upgradeable slot. The type of memory used is DDR4 SDRAM, and it comes in the SODIMM format, which is commonly used in laptops due to its compact size. For optimal performance, a RAM clock speed of 2666MHz (also referred to as PC4-21300) is recommended.
Asus X509FJ Memory Specifications & Maximum RAM Capacity
| Specification | Value |
|---|---|
| Laptop Model | Asus X509FJ |
| 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 Asus X509FJ RAM
How many RAM slots does the Asus X509FJ have?
Just one slot that you can access. There's 4GB soldered on the motherboard that you can't touch, plus the one upgradeable slot.
What's the maximum RAM I can have in total?
20GB total - that's 4GB soldered on the board plus up to 16GB in the slot you can upgrade.
What type of RAM do I need for this laptop?
You need DDR4 SODIMM - the small laptop memory sticks, not the full-size desktop ones.
What speed RAM should I get?
2666MHz is what's recommended. Also listed as PC4-21300 if you see it labeled that way.
Can I upgrade to 32GB total?
No, the single upgradeable slot maxes out at 16GB, so with the 4GB soldered, you're stuck at 20GB maximum.
Will faster RAM like 3200MHz work?
It'll probably work but will downclock to 2666MHz anyway, so save your money and just get 2666MHz.