Asus K42JK - RAM Upgrade Guide
The Asus K42JK laptop has two memory slots available for RAM upgrades, allowing for a maximum memory capacity of 8GB. It uses DDR3 SDRAM as the memory type, which comes in the SODIMM form factor, designed specifically for laptops and compact devices. For optimal performance, it is suggested to use RAM with a clock speed of 1066MHz, also referred to as PC3-8500.
Asus K42JK Memory Specifications & Maximum RAM Capacity
| Specification | Value |
|---|---|
| Laptop Model | Asus K42JK |
| Total memory slots | 2 |
| Maximum RAM | 8GB |
| Memory type | DDR3 SDRAM |
| Form factor | SODIMM (Small Outline Dual Inline Memory Module) |
| Recommended RAM clock speed | 1066MHz (PC3-8500) |
| Voltage | 1.35V - 1.5V |
| Number of pins | 204-pin |
FAQ about Asus K42JK RAM
How much RAM can I put in my K42JK laptop?
You can install up to 8GB total. The laptop has 2 memory slots, so that's typically 2x4GB sticks or one 8GB stick if you want to leave a slot open for future expansion.
What type of memory do I need for the K42JK?
You need DDR3 SODIMM modules - these are the smaller laptop memory sticks, not the full-size desktop ones. Make sure it's DDR3, not DDR4 or DDR5 which won't work.
What speed RAM should I get?
The recommended speed is 1066MHz (also labeled as PC3-8500). You can sometimes use faster RAM like 1333MHz or 1600MHz, but it'll just run at 1066MHz anyway, so no point paying extra for faster speeds.
Can I mix different RAM sizes or do they need to match?
You can mix sizes like 2GB + 4GB if needed, but matching pairs (like 4GB + 4GB) usually work better and might give you dual-channel performance benefits. Try to at least match the speed ratings.
Do I need to remove the old RAM or can I just add more?
Depends what's already installed. If both slots are full, you'll need to remove at least one stick. If there's an empty slot, you can just add another stick alongside what's already there.