Dynabook Dynabook Portege X40-K (2022) Specifications
The Dynabook Dynabook Portege X40-K (2022) 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 | i5-1245U / i7-1265U |
| RAM | DDR5, 2 slots (upgradeable) |
| Max RAM | 32GB |
| Storage | M.2 2280 NVMe PCIe Gen4, 1 slot |
| Charger | 65W USB-C |
| Ports | 1x USB-C 3.2, 2x USB 3.2, 1x HDMI, 1x RJ45 |
| Display | 14.0″ FHD IPS |
| Weight | 1.05 kg (2.32 lbs) |
Memory Upgrade Path
The Dynabook Portege X40-K features 2 SO-DIMM slots for DDR5 RAM, allowing upgrades up to 32GB. Both slots are user-accessible, and the upgrade process is straightforward.
Recommended DDR5 RAM Upgrades:
- Corsair Vengeance DDR5 SO-DIMM — Premium DDR5 laptop memory with excellent compatibility.
- Kingston Fury Impact DDR5 SO-DIMM — High-performance DDR5 with solid heat dissipation.
- Crucial DDR5 SO-DIMM — Budget-friendly DDR5 with proven stability.
Storage Expansion
The Dynabook Portege X40-K uses a standard M.2 2280 NVMe SSD with a NVMe PCIe Gen4 interface. The single M.2 slot supports drives up to 2TB.
Recommended M.2 2280 SSDs:
- Samsung 990 Pro NVMe 2280 — Flagship NVMe SSD with exceptional speeds.
- WD Black SN850X 2280 — High-performance NVMe with excellent sustained writes.
- Crucial P5 Plus NVMe 2280 — Excellent value NVMe with strong real-world performance.
Power Delivery & Charging
The Dynabook Portege X40-K 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: 1x USB-C 3.2, 2x USB 3.2, 1x HDMI, 1x RJ45
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 Dynabook Portege X40-K has a difficulty rating of 3/5 for upgrades (5 = easiest). The upgrade process is moderate — requires careful handling of bottom panel clips.
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 Dynabook Portege X40-K?
Yes, the Dynabook Portege X40-K has 2 SO-DIMM slots for user-upgradeable DDR5 memory, supporting up to 32GB.
What is the maximum RAM for the Dynabook Portege X40-K?
The Dynabook Portege X40-K supports up to 32GB of DDR5 memory.
Can I add a second SSD to the Dynabook Portege X40-K?
The Dynabook Portege X40-K has 1 M.2 slot. You can replace the existing SSD with a larger drive.
Can I use any USB-C charger with the Dynabook Portege X40-K?
Yes, any USB-C Power Delivery charger rated for 65W or higher will work with the Dynabook Portege X40-K.
Is the Dynabook Portege X40-K easy to upgrade?
The Dynabook Portege X40-K has a difficulty rating of 3/5. Some care needed with bottom panel clips.
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 |
|---|---|---|
| Corsair Vengeance DDR5 SO-DIMM | Premium DDR5 laptop memory with excellent compatibility. | View on Amazon UK |
| Kingston Fury Impact DDR5 SO-DIMM | High-performance DDR5 with solid heat dissipation. | View on Amazon UK |
| Crucial DDR5 SO-DIMM | Budget-friendly DDR5 with proven stability. | View on Amazon UK |
| Samsung 990 Pro NVMe 2280 | Flagship NVMe SSD with exceptional speeds. | View on Amazon UK |
| WD Black SN850X 2280 | High-performance NVMe with excellent sustained writes. | View on Amazon UK |
| Crucial P5 Plus NVMe 2280 | Excellent value NVMe with strong real-world performance. | 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.
Related Framework Upgrade Guides
- Dynabook Satellite Pro C50-J RAM & SSD Upgrade Guide
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- Dynabook Tecra A40-K RAM & SSD Upgrade Guide
- How to Upgrade Framework Laptop
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