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 where you can check current prices and availability.
| Product | Why We Recommend It | Amazon |
|---|---|---|
| Corsair Vengeance DDR5 SO-DIMM | Premium DDR5 laptop memory with excellent compatibility. | View on Amazon |
| Kingston Fury Impact DDR5 SO-DIMM | High-performance DDR5 with solid heat dissipation. | View on Amazon |
| Crucial DDR5 SO-DIMM | Budget-friendly DDR5 with proven stability. | View on Amazon |
| WD SN740 2230 NVMe | Reliable compact SSD for the 2230 form factor. | View on Amazon |
| Samsung PM991a 2230 | High-performance OEM SSD in compact 2230 size. | View on Amazon |
| Kioxia BG5 2230 | Compact 2230 NVMe with good availability. | View on Amazon |
| Anker 65W USB-C PD Charger | Compact GaN charger for USB-C laptops. | View on Amazon |
| Ugreen 65W USB-C PD Charger | Affordable universal USB-C charger. | View on Amazon |
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
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