Dynabook Portege X40-M (2024) Specifications
The Dynabook Portege X40-M (2024) 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 | Core Ultra 5 135U / Core Ultra 7 165U |
| RAM | LPDDR5x, 1 slot (upgradeable) |
| Max RAM | 32GB (soldered) |
| Storage | M.2 2230 NVMe PCIe Gen4, 1 slot |
| Charger | 65W USB-C |
| Ports | 2x Thunderbolt, 2x USB 3.2, 1x HDMI |
| Display | 14.0″ WUXGA IPS |
| Weight | 1.05 kg (2.32 lbs) |
Memory Upgrade Path
The Portege X40-M has partially soldered RAM with 1 user-accessible slot for additional memory, up to 32GB (soldered).
Recommended DDR5x 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 Portege X40-M uses an M.2 2230 NVMe SSD with a NVMe PCIe Gen4 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-M 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 Thunderbolt, 2x USB 3.2, 1x HDMI
The Thunderbolt ports enable high-speed data transfer and external GPU support. A Thunderbolt dock like the CalDigit TS3 Plus provides multi-display support.
Upgrade Difficulty & Tools Required
The Portege X40-M 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-M?
The Portege X40-M has partially soldered RAM with 1 additional user-accessible slot, supporting up to 32GB (soldered).
What is the maximum RAM for the Portege X40-M?
The Portege X40-M supports up to 32GB (soldered) of LPDDR5x memory.
What size SSD does the Portege X40-M use?
The Portege X40-M 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-M?
Yes, any USB-C Power Delivery charger rated for 65W or higher will work with the Portege X40-M.
Is the Portege X40-M easy to upgrade?
The Portege X40-M 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 |
|---|---|---|
| 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 |
| 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.
Related Dynabook Upgrade Guides
- Microsoft Surface Laptop 6 for Business RAM & SSD Upgrade Guide
- Microsoft Surface Go 3 RAM & SSD Upgrade Guide
- Microsoft Surface Laptop Studio RAM & SSD Upgrade Guide
- Microsoft Surface Pro 8 RAM & SSD Upgrade Guide
- Microsoft Surface Pro 7 RAM & SSD Upgrade Guide
- Dynabook Upgrade Guide
Not sure what fits? Use our free Compatibility Checker covering 3,195+ models.
