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Quick Specs Summary
| Spec | Details |
|---|---|
| Display | 14″ OLED (2880×1800) |
| CPU | Intel Core Ultra 5 / 7 |
| RAM Type | LPDDR5X (on package) |
| RAM Slots | 2 |
| Max RAM | 32GB |
| Storage | M.2 2280 NVMe Gen 4 |
| Charger | 65W USB-C |
Can You Upgrade the ASUS ExpertBook P5 P5405?
Partly. The ASUS ExpertBook P5 P5405 has LPDDR5X memory on package that cannot be upgraded, but the SSD is replaceable, making it possible to extend the lifespan of your laptop without sending it to a service centre. This guide covers compatible components, upgrade procedures, and step-by-step instructions.
RAM Compatibility
The ASUS ExpertBook P5 P5405 uses LPDDR5X (on package) memory with 0 user slots (on package), allowing up to 32GB total capacity. RAM is on package and cannot be upgraded.
Compatible RAM Modules
| Module | Capacity | Speed | Price* |
|---|---|---|---|
| Kingston Fury Impact SO-DIMM | 16GB | DDR5-5600 | |
| Corsair Vengeance SO-DIMM | 16GB | DDR5-5600 | |
| Samsung DDR5 SO-DIMM | 32GB | DDR5-5600 | |
| TeamGroup Elite DDR5 SO-DIMM | 16GB | DDR5-5600 |
SSD/Storage Compatibility
The ASUS ExpertBook P5 P5405 features M.2 2280 NVMe Gen 4 storage (plus a second M.2 2230 NVMe PCIe 4.0 slot) that is user-replaceable. You can upgrade to a larger capacity or faster model without opening a service ticket.
Compatible SSD Drives
| Model | Capacity | Type | Price* |
|---|---|---|---|
| Samsung 990 EVO | 1TB | M.2 2280 NVMe Gen 4 | View on Amazon |
| WD Black SN770 | 1TB | M.2 2280 NVMe Gen 4 | View on Amazon |
| Kingston NV2 | 1TB | M.2 2280 NVMe Gen 3 | View on Amazon |
| SK Hynix P41 | 1TB | M.2 2280 NVMe Gen 4 | View on Amazon |
Charger Compatibility
The ASUS ExpertBook P5 P5405 requires a 65W USB-C charger. You can use any compatible USB-C power adapter that meets or exceeds the wattage specification, or stick with the original for guaranteed compatibility.
Compatible USB-C Chargers
| Charger | Wattage | Type | Price* |
|---|---|---|---|
| Anker Nano II | 65W | USB-C GaN | View on Amazon |
| UGREEN Nexode | 65W | USB-C GaN | View on Amazon |
| Baseus GaN | 100W | USB-C | View on Amazon |
| Anker Prime | 100W | USB-C GaN | View on Amazon |
Dock & Peripheral Compatibility
The ASUS ExpertBook P5 P5405 features standard USB ports and typically supports USB-C docking stations. Look for docks with USB-C or Thunderbolt connectivity to expand your port selection with HDMI, additional USB-A ports, and SD card readers. Compatibility depends on your specific model year and port configuration.
Upgradeability Score Breakdown
| Component | Score | Notes |
|---|---|---|
| RAM | Very good (4/5) | LPDDR5X on package, not upgradeable |
| SSD | Very good (4/5) | M.2 NVMe; tool-free replacement |
| Charger | Moderate (3/5) | USB-C standard; many options available |
| Overall | Very good (4/5) | Highly upgradeable design |
How to Upgrade
RAM Upgrade: The RAM is LPDDR5X on package and cannot be upgraded.
SSD Upgrade: Turn off the laptop and unplug it. Remove the SSD cover or small compartment. Gently remove the existing NVMe drive by pressing the screw on the end. Align the new drive at a 45-degree angle into the M.2 slot, press down, and secure with the retaining screw.
Frequently Asked Questions
What RAM does the ASUS ExpertBook P5 P5405 use?
The ASUS ExpertBook P5 P5405 uses LPDDR5X (on package) memory with 0 slots (on package). Maximum capacity is 32GB.
Can I upgrade the RAM in the ASUS ExpertBook P5 P5405?
No. The RAM is LPDDR5X on package and cannot be upgraded.
What SSD fits the ASUS ExpertBook P5 P5405?
The ASUS ExpertBook P5 P5405 uses a M.2 2280 NVMe Gen 4 drive (the second slot takes M.2 2230 PCIe 4.0 only). Ensure any replacement SSD matches this form factor and interface.
What charger does the ASUS ExpertBook P5 P5405 need?
A 65W USB-C charger is required. Any compatible USB-C power adapter meeting or exceeding this wattage will work.
Is the ASUS ExpertBook P5 P5405 good for upgrading?
Partly. The RAM is on package and cannot be upgraded, but the ASUS ExpertBook P5 P5405 has two M.2 SSD slots (one 2280 and one 2230, both PCIe 4.0).
Recommended Products
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Not sure what fits? Use our free Compatibility Checker covering 3,195+ models.
Helpful Guides
Upgrades that fit the ASUS ExpertBook P5 P5405
What fits: Memory: LPDDR5X soldered to the board — not upgradeable · Storage: M.2 2280 NVMe PCIe 4.0; M.2 2230 NVMe PCIe 4.0 · Charger: USB-C PD 65W
Spec source: asus.com (checked 26 Sep 2026).
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M.2 2280 NVMe SSDs that fit
USB-C charger (65W)
*Indicative UK street prices, shown for guidance only. These are not live Amazon prices and change frequently — check the current price on Amazon before buying.
