Asus X45U - RAM Upgrade Guide

The Asus X45U laptop has a single memory slot for RAM upgrades. It supports a maximum of 4GB of memory. The type of RAM compatible with this model is DDR3 SDRAM, and it uses a smaller form factor known as SODIMM, which is typical for laptops. For best performance, the RAM should have a clock speed of 1333MHz, also referred to as PC3-10600.
Asus X45U Memory Specifications & Maximum RAM Capacity
| Specification | Value |
|---|---|
| Laptop Model | Asus X45U |
| Total memory slots | 1 |
| Maximum RAM | 4GB |
| Memory type | DDR3 SDRAM |
| Form factor | SODIMM (Small Outline Dual Inline Memory Module) |
| Recommended RAM clock speed | 1333MHz (PC3-10600) |
| Voltage | 1.35V - 1.5V |
| Number of pins | 204-pin |
FAQ about Asus X45U RAM
How much RAM can I put in my X45U laptop?
Max is 4GB total. It's got just one slot, so whatever stick you put in there is all you get.
What type of memory does the X45U use?
DDR3 SODIMM - that's the smaller laptop-sized RAM, not the big desktop sticks. Make sure you get SODIMM specifically.
What speed RAM should I get for the X45U?
1333MHz (also labeled as PC3-10600) is what works best. You could try faster RAM but the laptop will just run it at 1333 anyway.
Can I add more RAM slots to get past the 4GB limit?
Nope, the motherboard only has one slot and that's it. The 4GB ceiling is a hard limit - no way around it.
Will any DDR3 work or does it have to be laptop memory?
Has to be laptop memory (SODIMM). Desktop DDR3 is physically too big and won't fit in the slot.
Is upgrading from 2GB to 4GB worth it on this laptop?
Usually yes - going from 2 to 4GB makes a noticeable difference for web browsing and basic tasks. Just don't expect miracles since 4GB is still pretty limited these days.