Asus K40AF - RAM Upgrade Guide
The Asus K40AF laptop has two memory slots available for RAM upgrades, allowing for a maximum capacity of 6GB. It uses DDR2 SDRAM as the memory type and requires SODIMM modules, which are smaller in size and designed for laptops. For optimal performance, the recommended RAM clock speed is 800MHz, often labeled as PC2-6400.
Asus K40AF Memory Specifications & Maximum RAM Capacity
| Specification | Value |
|---|---|
| Laptop Model | Asus K40AF |
| Total memory slots | 2 |
| Maximum RAM | 6GB |
| Memory type | DDR2 SDRAM |
| Form factor | SODIMM (Small Outline Dual Inline Memory Module) |
| Recommended RAM clock speed | 800MHz (PC2-6400) |
| Voltage | 1.8V |
| Number of pins | 200-pin |
FAQ about Asus K40AF RAM
How much RAM can I put in an Asus K40AF laptop?
Maximum is 6GB total. The laptop has 2 memory slots, but it's limited to 6GB even though you'd expect 8GB with two 4GB sticks. This is a chipset limitation common in older laptops.
What type of RAM does the K40AF use?
DDR2 SODIMM modules running at 800MHz (also called PC2-6400). Make sure you get laptop memory (SODIMM), not desktop RAM - they're physically different sizes and won't fit.
Can I mix different RAM sizes in the two slots?
Yes, you can mix sizes like 4GB + 2GB to reach the 6GB maximum. The system will run them in single-channel mode when sizes don't match, which is slightly slower than matched pairs but still works fine.
Will faster DDR2 RAM work in this laptop?
Yes, faster DDR2 like 1066MHz will work but will automatically slow down to 800MHz to match what the laptop supports. No harm done, just no speed benefit either.
Is it worth upgrading from 2GB to 6GB?
Definitely. Going from 2GB to 6GB makes a huge difference for multitasking, web browsing with multiple tabs, and general responsiveness. It's one of the best upgrades for older laptops.