The T450 has 2 memory slots; the T450s has a single slot with 4GB soldered. In general, 5th generation machines will support the 16GB DIMMs now available. They are expensive, but they do allow more expansion. This implies a max of 20GB on T450s and 32GB on T450.

1. The Laptop has 2 Slots to install memory, already with 4 GB standard memory installed. For best Lenovo ThinkPad T450 Laptop performance use the maximum amount of 16 GB, fill all the slots with the max allowed memory per slot for your Laptop. What is the warranty on these memory? What if the memory is not compatible?
2. Lenovo ThinkPad T450s - Intel Core i5-5200U ( 2.20GHz 1600MHz 3MB) 20bx001pus $467.00 Lenovo ThinkPad T450s Ultrabook - Intel Core i7-5600U (4MB Cache, up to 3.20GHz) t450sbestsap.

In this guide, I’ll be taking apart a Lenovo ThinkPad T450s in order to access and upgrade the hard drive, SSD and RAM.

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Lenovo T450 Memory Upgrade Instructions

1. Removing the bottom cover

First of all, unlock and remove the battery.
Remove all screws securing the bottom cover. Pry up and remove the cover.
You can use a guitar pick or any other piece of plastic to split the case.

Under the bottom cover you can get access to the following internal components:
– Hard drive
– RAM slot
– M.2 slot
– Internal battery
– Heat sink and Cooling Fan
– Wireless card
– CMOS battery
– Speaker

2. Upgrade the RAM

The ThinkPad T450s comes with 4GB DDR3L-1600MHz RAM, but it’s also has a spare RAM slot.
In my case, I will add a Kingston 8GB RAM.

Here’s my new Kingston 8GB DDR3L-1600MHz RAM.

3. Upgrade the SSD

Lenovo Thinkpad T450s Ram Slots

Here’s WWAN M.2 slot, I will install a Plextor 2242 M.2 SSD into the slot.

Lenovo T450s Memory Slots Downloads

4. Upgrade the hard drive

Lenovo T450s Memory Upgrade

The T450s comes with HGST 500GB 7200RPM hard drive. If necessary, you can upgrade to a larger capacity hard drive, or replace it with a 2.5″ SSD.