Asus U31SD - RAM Upgrade Guide

The Asus U31SD laptop has two memory slots available for RAM upgrades. It can support a maximum of 8GB of memory. The type of RAM compatible with this model is DDR3 SDRAM, and it uses a SODIMM format, which is a smaller type of memory module designed for laptops. For optimal performance, it is suggested to use RAM with a clock speed of 1333MHz, also referred to as PC3-10600.
Asus U31SD Memory Specifications & Maximum RAM Capacity
| Specification | Value |
|---|---|
| Laptop Model | Asus U31SD |
| Total memory slots | 2 |
| Maximum RAM | 8GB |
| 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 U31SD RAM
How much RAM can I put in the Asus U31SD laptop?
Maximum is 8GB total. The laptop has 2 memory slots, so you can install either two 4GB modules or keep one existing module and add another to reach 8GB.
What type of memory does the U31SD use?
It uses DDR3 SODIMM modules - these are the smaller laptop memory sticks, not the full-size desktop ones. Make sure you get SODIMM specifically.
What speed RAM should I get for the U31SD?
Look for 1333MHz DDR3 (also labeled as PC3-10600). The laptop might work with faster RAM like 1600MHz, but it'll just run at 1333MHz anyway, so no point paying extra.
Can I mix different RAM sizes in the U31SD?
Yes, you can mix sizes like 2GB + 4GB to get 6GB total. Just make sure both sticks are DDR3 SODIMM. Matching sizes is ideal for dual-channel performance, but mixing works fine.
Do I need to remove the existing RAM to upgrade?
Depends what's already installed. If you have one stick and an empty slot, just add another. If both slots are filled with smaller modules (like 2x2GB), you'll need to replace at least one to increase capacity.