Asus VivoBook X405UA - RAM Upgrade Guide
The Asus VivoBook X405UA has two memory slots for RAM, but only one of these slots can be upgraded by the user. The laptop supports a maximum of 20GB of memory, with up to 16GB possible in the user-accessible slot. It uses DDR4 SDRAM, which comes in a small form factor known as SODIMM. For optimal performance, the recommended clock speed for the RAM is 2133MHz, also referred to as PC4-17000.
Asus VivoBook X405UA Memory Specifications & Maximum RAM Capacity
| Specification | Value |
|---|---|
| Laptop Model | Asus VivoBook X405UA |
| 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 | 2133MHz (PC4-17000) |
| Voltage | Low - 1.2V |
| Number of pins | 260-pin |
FAQ about Asus VivoBook X405UA RAM
How much RAM can I add to my VivoBook X405UA?
You can add up to 16GB in the single accessible slot. The laptop has 4GB soldered on the motherboard that can't be changed, so maximum total is 20GB (4GB fixed + 16GB you add).
Why can't I upgrade both RAM slots?
One slot has RAM permanently soldered to the motherboard - pretty common in thin laptops to save space. Only one slot uses regular SODIMM modules you can swap out.
What type of RAM do I need to buy?
DDR4 SODIMM modules running at 2133MHz. Make sure it's SODIMM (the smaller laptop memory) not regular desktop DIMM. Look for PC4-17000 on the specs if you're unsure.
Can I use faster RAM like 2400MHz or 3200MHz?
You can install it, but it'll only run at 2133MHz anyway. The system will downclock faster RAM to match what it supports. Save money and just get 2133MHz.
Is it worth upgrading from 4GB to 20GB?
Huge difference for multitasking. Going from 4GB to 20GB means you can keep way more browser tabs open, run multiple programs smoothly, and generally makes the laptop feel much snappier. Probably the best upgrade you can do.