Asus X509FB - RAM Upgrade Guide
The Asus X509FB laptop has a single memory slot available for RAM upgrades. It can support a maximum of 20GB of memory, with up to 16GB accessible in the user-upgradeable slot. The type of memory used is DDR4 SDRAM, and it comes in the SODIMM form factor, which is a smaller design typically used in laptops. For best performance, it is recommended to use RAM with a clock speed of 2666MHz, also referred to as PC4-21300.
Asus X509FB Memory Specifications & Maximum RAM Capacity
| Specification | Value |
|---|---|
| Laptop Model | Asus X509FB |
| 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 X509FB RAM
How many RAM slots does the Asus X509FB have?
Just one slot that you can access. The laptop has some memory soldered to the motherboard plus this single upgrade slot.
What's the maximum RAM I can install in the X509FB?
You can add up to 16GB in the available slot. The system supports 20GB total, which means there's 4GB soldered on the board that you can't change.
What type of memory do I need for this laptop?
You need DDR4 SODIMM modules - the smaller laptop memory sticks, not the full-size desktop ones.
What speed RAM should I get?
2666MHz is the recommended speed. That's also labeled as PC4-21300 if you see it listed that way.
Can I use faster RAM like 3200MHz?
You can install it, but it'll just run at 2666MHz anyway. No point spending extra for faster memory that won't actually run faster in this system.
Will any DDR4 SODIMM work?
As long as it's DDR4 SODIMM at 2666MHz or compatible speeds, and 16GB or less, it should work fine. Don't try to use DDR3 or DDR5 - it won't fit and could damage things.