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Quick Specs Summary
| Spec | Details |
|---|---|
| Display | 14″ 3K OLED |
| CPU | Intel Core Ultra (Series 1, Meteor Lake) |
| RAM Type | LPDDR5X |
| RAM Slots | Soldered |
| Max RAM | 16GB |
| SSD Type | M.2 2280 PCIe Gen 4 NVMe |
| SSD Slots | 1 |
| Charger | 90W USB-C PD |
| Thunderbolt | 2x Thunderbolt 4 |
| Upgradeability | Limited (2/5) |
Can You Upgrade the VivoBook S 14?
The ASUS VivoBook S 14 S5406MA is limited — the 16GB of LPDDR5X memory is soldered on board, so only the SSD can be upgraded. It runs an Intel Core Ultra (Series 1) processor and has one M.2 2280 PCIe 4.0 SSD slot, 2x Thunderbolt 4 ports and a 90W USB-C adapter.
This guide covers exactly which components you can and can’t replace, what compatible upgrades cost, and how to do it safely. We’ll walk through RAM, SSD, charger options, and break down your upgradeability score at the end.
RAM Compatibility
The ASUS VivoBook S 14 S5406MA uses LPDDR5X RAM that is soldered directly to the motherboard. This means you cannot upgrade the RAM after purchase.
When you buy this model, it ships with 16GB RAM. If you need more than the configuration available, you’ll need to buy a model with higher RAM spec — there’s no way to upgrade it later. This is unfortunately common in thin-and-light business laptops where manufacturers prioritise minimalism over repairability.
Learn more about soldered vs upgradeable RAM on our RAM compatibility hub.
What RAM Configuration Should I Buy?
Since you can’t upgrade, think carefully about your workflow:
- Light use (web, Office, email): 8GB is adequate but tight by 2026 standards.
- Office work & multitasking: 16GB is the sweet spot for most users.
- Development, virtualisation, creative work: 32GB is strongly recommended.
Buy the configuration you’ll need for the next 3–4 years — you won’t be able to add more later.
SSD/Storage Compatibility
The ASUS VivoBook S 14 S5406MA has 1 × M.2 2280 PCIe Gen 4 NVMe slot. You can replace the SSD with a faster or larger model.
Compatible SSD Drives
| Drive | Spec | Price* |
|---|---|---|
| Samsung 990 Pro 1TB | M.2 2280 PCIe Gen 4 | £85 |
| WD Black SN850X 1TB | M.2 2280 PCIe Gen 4 | £75 |
| Crucial P5 Plus 1TB | M.2 2280 PCIe Gen 4 | £60 |
Charger Compatibility
The ASUS VivoBook S 14 S5406MA charges via USB-C Power Delivery at 90W. This is excellent news — you can use compatible third-party chargers, charge from power banks, and simplify your cable collection.
Compatible USB-C Chargers
| Charger | Spec | Price* |
|---|---|---|
| Anker Prime 67W GaN | USB-C PD 67W | £32 |
| Ugreen Nexode 65W | USB-C PD 65W | £28 |
Browse USB-C chargers on Amazon
Dock & Peripheral Compatibility
Unlike laptops that do not include Thunderbolt, the S5406MA has 2x Thunderbolt 4 ports (with display and power delivery support), 2x USB-A 3.2 Gen 1 and HDMI 2.1.
You can use Thunderbolt 4 or USB-C docks; look for models rated for your charger wattage or higher to avoid slow charging.
View our dock compatibility guide.
Upgradeability Score Breakdown
| Component | Score | Notes |
|---|---|---|
| RAM | 0 (0/5) | Soldered — no upgrade |
| SSD | Excellent (5/5) | Replaceable M.2 |
| Charger | Very good (4/5) | USB-C PD — use any compatible charger |
| Overall | Limited (2/5) | Composite score across all upgradeable components |
How to Upgrade
Upgrading the SSD in the ASUS VivoBook S 14 S5406MA is straightforward and doesn’t require special tools beyond a Phillips #0 screwdriver.
RAM: The RAM is soldered to the motherboard and cannot be upgraded.
SSD upgrade: Remove the M.2 cover, unscrew the drive retention screw, and slide in your new NVMe at the same 45° angle.
Check iFixit for a detailed VivoBook S 14 teardown guide before you start — it’s always good to see exactly what you’re working with.
Return to the ASUS laptop upgrade hub.
Frequently Asked Questions
What RAM does the ASUS VivoBook S 14 S5406MA use?
The ASUS VivoBook S 14 S5406MA uses LPDDR5X in Soldered slots (soldered to the motherboard). Maximum capacity is 16GB.
Can I upgrade the RAM in the ASUS VivoBook S 14 S5406MA?
No — the RAM is soldered to the motherboard and cannot be upgraded. Choose your RAM configuration carefully at purchase.
What SSD fits the ASUS VivoBook S 14 S5406MA?
An M.2 2280 PCIe Gen 4 NVMe SSD fits the ASUS VivoBook S 14 S5406MA. Current options include the Samsung 990 Pro, WD Black SN850X, and Crucial P5 Plus.
What charger does the ASUS VivoBook S 14 S5406MA need?
The ASUS VivoBook S 14 S5406MA requires a 90W USB-C PD charger. Any compatible USB-C PD charger rated for this wattage will work.
Is the ASUS VivoBook S 14 S5406MA good for upgrading?
Limited — the 16GB of LPDDR5X memory is soldered on board, so only the SSD can be upgraded. It runs an Intel Core Ultra (Series 1) processor and has one M.2 2280 PCIe 4.0 SSD slot, 2x Thunderbolt 4 ports and a 90W USB-C adapter.
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 |
|---|---|---|
| Samsung 990 Pro 2TB NVMe M.2 2280 | Fastest consumer NVMe — ideal for gaming & editing | View on Amazon |
| WD Black SN850X 2TB NVMe | Excellent Gen4 speed with heatsink option | View on Amazon |
| Crucial P5 Plus 1TB NVMe | Great value Gen4 SSD | View on Amazon |
| Kingston NV2 1TB NVMe | Budget-friendly with solid reliability | View on Amazon |
Prices and availability may vary. As an Amazon Associate, we earn from qualifying purchases.
Related ASUS Upgrade Guides
- Best RAM for ASUS Laptops 2026
- ASUS ProArt StudioBook 16 OLED (2023) RAM & SSD Upgrade Guide (2023)
- ASUS ProArt StudioBook 16 OLED (2024) RAM & SSD Upgrade Guide (2024)
- ASUS ProArt StudioBook 16 OLED (2022) RAM & SSD Upgrade Guide (2022)
- ASUS ExpertBook B9 (2023) RAM & SSD Upgrade Guide (2023)
- ASUS Upgrade Guide
Not sure what fits? Use our free Compatibility Checker covering 3,195+ models.
Helpful Guides
Upgrades that fit the ASUS Vivobook S 14 OLED
What fits: Memory: LPDDR5X soldered to the board — not upgradeable · Storage: M.2 2280 NVMe PCIe 4.0 · Charger: USB-C PD 90W
Spec source: asus.com (checked 26 Sep 2026).
As an Amazon Associate we earn from qualifying purchases. Prices & availability shown on Amazon.
M.2 2280 NVMe SSDs that fit
USB-C charger (100W)
*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.
