Asus VivoBook X512FB - RAM Upgrade Guide
The Asus VivoBook X512FB has two memory slots for RAM, but only one of them can be upgraded by the user. The laptop supports a maximum memory capacity of 20GB, with up to 16GB available in the slot that can be accessed for upgrades. It uses DDR4 SDRAM, which comes in a small outline dual inline memory module (SODIMM) format. For best performance, a RAM clock speed of 2666MHz (also referred to as PC4-21300) is recommended.
Asus VivoBook X512FB Memory Specifications & Maximum RAM Capacity
| Specification | Value |
|---|---|
| Laptop Model | Asus VivoBook X512FB |
| 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 | 2666MHz (PC4-21300) |
| Voltage | Low - 1.2V |
| Number of pins | 260-pin |
FAQ about Asus VivoBook X512FB RAM
How much RAM can I add to my X512FB?
You can add up to 16GB in the single upgradeable slot. The laptop comes with 4GB soldered that can't be changed, so maximum total is 20GB (4GB fixed + 16GB you add).
What type of RAM do I need for this laptop?
You need DDR4 SODIMM (the smaller laptop-sized modules). Speed should be 2666MHz, also labeled as PC4-21300.
Can I upgrade both RAM slots?
No, only one slot is accessible for upgrades. The other has 4GB permanently soldered to the motherboard.
What happens if I install faster RAM like 3200MHz?
It'll work but automatically downclock to 2666MHz to match the system's maximum supported speed. You won't get any performance benefit from the higher speed rating.
Is it worth maxing out to 20GB total?
For most users, yes. Going from 4GB to 20GB makes a huge difference for multitasking, running multiple browser tabs, and general smoothness. The 16GB upgrade module costs around $40-60.
Will any DDR4 SODIMM work?
As long as it's DDR4 SODIMM 2666MHz or higher, it should work. Lower voltage modules (1.2V) are standard. Avoid DDR3 or desktop-sized DIMMs - they won't physically fit.