Asus X543UB - RAM Upgrade Guide

The Asus X543UB laptop has a total of two memory slots for RAM, but only one of these slots can be upgraded by the user. The maximum amount of memory the laptop can support is 12GB, with up to 8GB possible in the accessible slot. The type of memory used is DDR4 SDRAM, and it comes in a small outline dual inline memory module (SODIMM) format. For best performance, the recommended RAM clock speed is 2400MHz, which corresponds to a PC4-19200 rating.
Asus X543UB Memory Specifications & Maximum RAM Capacity
| Specification | Value |
|---|---|
| Laptop Model | Asus X543UB |
| Total memory slots | 2 (1 not upgradeable) |
| Maximum RAM | 12GB (up to 8GB in user accessible slot) |
| Memory type | DDR4 SDRAM |
| Form factor | SODIMM (Small Outline Dual Inline Memory Module) |
| Recommended RAM clock speed | 2400MHz (PC4-19200) |
| Voltage | Low - 1.2V |
| Number of pins | 260-pin |
FAQ about Asus X543UB RAM
How many RAM slots does the Asus X543UB have and can I access them all?
There are 2 total slots, but only 1 is accessible for upgrades. The other slot has 4GB soldered directly to the motherboard that can't be removed or replaced.
What's the maximum RAM I can have in this laptop?
12GB total - that's the 4GB built-in plus up to 8GB in the upgradeable slot. You can't go higher than this even if you find bigger modules.
What type of RAM do I need to buy?
You need DDR4 SODIMM modules - the smaller laptop-sized sticks, not the full-size desktop ones. Make sure it's DDR4, not DDR3 or DDR5.
What speed RAM should I get?
2400MHz (also labeled as PC4-19200) is the recommended speed. The laptop might work with faster RAM, but it'll just run at 2400MHz anyway, so no point paying extra for faster speeds.
Can I add another 4GB stick to make it 8GB total?
Yes, adding a 4GB stick would give you 8GB total (4GB built-in + 4GB new). This is a common upgrade that works well.
Is it worth maxing out with an 8GB stick?
If you're already opening up the laptop and buying RAM, might as well go for the 8GB stick to hit the 12GB maximum. The price difference between 4GB and 8GB modules usually isn't huge.