Dynabook Portege X40-J (2021) Specifications
The Dynabook Portege X40-J (2021) is a professional-grade business laptop for enterprise users. This guide covers RAM, SSD, charger compatibility, and upgrade paths for this model. For a comprehensive overview of all Dynabook upgradeable models, visit the Dynabook Laptop Upgrades hub.
| Component | Specification |
|---|---|
| Processor | i7-1165G7 |
| RAM | LPDDR4x, 0 slots (soldered) |
| Max RAM | 32GB (soldered) |
| Storage | M.2 2230 NVMe PCIe Gen3, 1 slot |
| Charger | 65W USB-C |
| Ports | 2x USB-C, 2x USB 3.2, 1x HDMI |
| Display | 14.0″ FHD IPS |
| Weight | 1.05 kg (2.32 lbs) |
Memory Upgrade Path
The Portege X40-J has soldered LPDDR4x RAM (32GB (soldered)) which cannot be upgraded after purchase. Select the maximum RAM configuration when buying.
Important: Since the RAM is not user-replaceable, we recommend opting for at least 16GB at purchase to ensure adequate performance for years to come.
Storage Expansion
The Portege X40-J uses an M.2 2230 NVMe SSD with a NVMe PCIe Gen3 interface. The single M.2 slot supports drives up to 2TB.
Recommended M.2 2230 SSDs:
- WD SN740 2230 NVMe — Reliable compact SSD for the 2230 form factor.
- Samsung PM991a 2230 — High-performance OEM SSD in compact 2230 size.
- Kioxia BG5 2230 — Compact 2230 NVMe with good availability.
Note: M.2 2230 drives are less common than the standard 2280. Verify compatibility before purchasing.
Power Delivery & Charging
The Portege X40-J uses a 65W USB-C charger. This is compatible with any USB-C PD charger of equal or higher wattage from brands like Anker, Ugreen, or the original Dynabook charger.
Compatible USB-C PD Chargers:
- Anker 65W USB-C PD Charger — Compact GaN charger with multiple ports.
- Ugreen USB-C PD Charger (65W+) — Affordable universal charger with fast charging.
- INIU USB-C PD Fast Charger — Budget option with reliable performance.
Port & Docking Capabilities
Connectivity: 2x USB-C, 2x USB 3.2, 1x HDMI
A USB-C docking station like the Anker 577 USB-C Hub provides additional ports including HDMI, Ethernet, and USB-A.
Upgrade Difficulty & Tools Required
The Portege X40-J has a difficulty rating of 2/5 for upgrades (5 = easiest). The upgrade process is difficult — limited user-accessible components.
Tools needed:
- Phillips screwdriver (M2.5 or similar)
- Plastic spudger or pry tool (for bottom panel clips)
- ESD wrist strap (optional but recommended)
We recommend backing up your data and consulting the official service manual before opening the chassis.
Frequently Asked Questions
Can I upgrade the RAM in the Dynabook Portege X40-J?
The Portege X40-J has soldered RAM (32GB (soldered)) which cannot be upgraded after purchase. Choose the maximum RAM when buying.
What is the maximum RAM for the Portege X40-J?
The Portege X40-J supports up to 32GB (soldered) of LPDDR4x memory.
What size SSD does the Portege X40-J use?
The Portege X40-J uses an M.2 2230 NVMe SSD. Make sure to purchase the correct form factor for compatibility.
Can I use any USB-C charger with the Portege X40-J?
Yes, any USB-C Power Delivery charger rated for 65W or higher will work with the Portege X40-J.
Is the Portege X40-J easy to upgrade?
The Portege X40-J has a difficulty rating of 2/5. Consider professional assistance for upgrades.
Recommended Products
These are the products we recommend based on this guide. All links go to Amazon UK where you can check current prices and availability.
| Product | Why We Recommend It | Amazon UK |
|---|---|---|
| WD SN740 2230 NVMe | Reliable compact SSD for the 2230 form factor. | View on Amazon UK |
| Samsung PM991a 2230 | High-performance OEM SSD in compact 2230 size. | View on Amazon UK |
| Kioxia BG5 2230 | Compact 2230 NVMe with good availability. | View on Amazon UK |
| Anker 65W USB-C PD Charger | Compact GaN charger for USB-C laptops. | View on Amazon UK |
| Ugreen 65W USB-C PD Charger | Affordable universal USB-C charger. | View on Amazon UK |
Prices and availability may vary. As an Amazon Associate, we earn from qualifying purchases.
