Asus X509UB - RAM Upgrade Guide

The Asus X509UB laptop has a single memory slot available for RAM upgrades. It can support a maximum of 24GB of memory, with up to 16GB in the user-accessible slot. The type of memory compatible with this laptop is DDR4 SDRAM, and it uses a SODIMM form factor, which is a compact type of memory module commonly used in laptops. For optimal performance, a RAM clock speed of 2666MHz (also referred to as PC4-21300) is recommended.
Asus X509UB Memory Specifications & Maximum RAM Capacity
| Specification | Value |
|---|---|
| Laptop Model | Asus X509UB |
| Total memory slots | 1 |
| Maximum RAM | 24GB (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 X509UB RAM
How many RAM slots does the Asus X509UB have?
Just one user-accessible slot. There's also some memory soldered to the motherboard that you can't change.
What's the maximum RAM I can install in this laptop?
You can add up to 16GB in the available slot. Combined with the soldered memory, the total system maximum is 24GB.
What type of RAM do I need for the X509UB?
You need DDR4 SODIMM - that's the smaller laptop-sized memory stick, not the full-size desktop RAM.
What speed RAM should I get?
2666MHz is the recommended speed. It's also labeled as PC4-21300 if you see that on the packaging instead.
Can I use faster RAM like 3200MHz?
You can install it, but it'll just run at 2666MHz anyway. Save your money and stick with 2666MHz modules.
Is it worth upgrading the RAM on this laptop?
If you're running multiple programs or browser tabs and things feel sluggish, adding more RAM can definitely help. Check your current usage in Task Manager first to see if you're maxing out what you have.