Lenovo ThinkPad T490 - RAM Upgrade Guide
The Lenovo T490 laptop has two memory slots for RAM, but only one of them can be upgraded by the user. The maximum amount of memory the device can support is 48GB, with up to 32GB possible in the slot that can be accessed for upgrades. 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 speed for the RAM is 2400MHz, which corresponds to a PC4-19200 specification.
Lenovo ThinkPad T490 Memory Specifications & Maximum RAM Capacity
| Specification | Value |
|---|---|
| Laptop Model | Lenovo ThinkPad T490 |
| Total memory slots | 2 (1 not upgradeable) |
| Maximum RAM | 48GB (up to 32GB 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 Lenovo ThinkPad T490 RAM
How many RAM slots does the T490 have and can I upgrade both?
The T490 has 2 RAM slots total, but only 1 is accessible for upgrades. The other slot has soldered memory that can't be changed.
What's the maximum RAM I can have in my T490?
You can get up to 48GB total - that's combining whatever's soldered on board with up to 32GB in the upgradeable slot.
What type of RAM do I need for the T490?
You need DDR4 SODIMM modules - the laptop-sized ones, not desktop RAM. Make sure it's DDR4, not DDR3 or DDR5.
What speed RAM should I buy?
2400MHz (also labeled as PC4-19200) is the recommended speed. Faster RAM will work but will just run at 2400MHz anyway.
Can I mix different RAM sizes or speeds?
Yes, but it's not ideal. The system will run at the speed of the slower module, and mixing sizes can prevent dual-channel mode from working optimally.
How do I find out how much soldered RAM my T490 has?
Check your system info in Windows or run a tool like CPU-Z. The soldered amount varies by model - could be 8GB, 16GB, etc.