Lenovo ThinkPad T400 (7417) - RAM Upgrade Guide
The Lenovo T400 (model 7417) laptop can be upgraded with additional memory to enhance its performance. It has two slots available for RAM, allowing a maximum total capacity of 8GB. The type of memory supported is DDR3 SDRAM, and it comes in the SODIMM form factor, which is a smaller design commonly used in laptops. For optimal performance, the recommended clock speed for the RAM is 1066MHz, often labeled as PC3-8500.
Lenovo ThinkPad T400 (7417) Memory Specifications & Maximum RAM Capacity
| Specification | Value |
|---|---|
| Laptop Model | Lenovo ThinkPad T400 (7417) |
| 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 Lenovo ThinkPad T400 (7417) RAM
How much RAM can I put in a T400?
Maximum is 8GB total - that's 4GB per slot since you've got 2 slots to work with.
What type of memory does the T400 use?
DDR3 SODIMM - the laptop-sized memory sticks, not the full-size desktop ones.
What speed RAM should I get?
1066MHz (PC3-8500) is what works best. You can technically use faster RAM but it'll just run at 1066 anyway.
Can I mix different RAM sizes?
Yeah, you can do like 2GB + 4GB if you want. Just know that dual channel performance is better with matched pairs.
Do I need to remove the old RAM first?
Depends what's already in there. If both slots are full, yeah you'll need to take out at least one stick to upgrade.
Is 8GB really the max or can I push it higher?
8GB is the hard limit - the chipset won't recognize anything more even if you stick in bigger modules.