Asus X509UA - RAM Upgrade Guide
The Asus X509UA laptop has a single memory slot for RAM upgrades. It can support a maximum of 24GB of memory, with up to 16GB accessible in the user-replaceable slot. The type of memory used is DDR4 SDRAM, and it comes in a SODIMM format, which is a smaller design commonly used in laptops. For optimal performance, the recommended RAM speed is 2666MHz, also referred to as PC4-21300.
Asus X509UA Memory Specifications & Maximum RAM Capacity
| Specification | Value |
|---|---|
| Laptop Model | Asus X509UA |
| 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 X509UA RAM
How many RAM slots does the Asus X509UA have?
Just one slot that you can access. The laptop has some memory soldered to the motherboard that you can't change, plus this one upgradeable slot.
What's the maximum RAM I can install in the X509UA?
You can put up to 16GB in the user-accessible slot. The system maxes out at 24GB total, which means there's already 8GB soldered on the motherboard that you can't remove or upgrade.
What type of RAM do I need for this laptop?
You need DDR4 SODIMM modules - the smaller laptop memory sticks, not the full-size desktop ones. Make sure it's DDR4, not the older DDR3 or newer DDR5.
What speed RAM should I get?
2666MHz is the recommended speed. You might see this listed as PC4-21300 on some memory modules - same thing. You can technically install faster RAM, but it'll just run at 2666MHz anyway.
Can I mix different RAM speeds or brands?
Since you've only got one upgradeable slot and the other memory is soldered, you're already mixing. Just stick with 2666MHz to match what's built in. Brand doesn't really matter as long as it's the right spec.
Is it worth upgrading from 8GB to 24GB total?
Depends what you're doing. For basic web browsing and office work, 8GB is usually fine. If you're multitasking heavily, working with large files, or keeping tons of browser tabs open, the upgrade to 24GB will make things noticeably smoother.