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ASUS Zenbook Pro 14 OLED (UX6404) Specifications
Correction (September 2026): this page previously described an “ASUS Pro 14 OLED (2024) UX6404” with a Core Ultra 9 185H, two M.2 slots and a 180W USB-C charger. The UX6404 is a 2023 machine built on 13th Gen Intel silicon, it has one M.2 slot, and it uses a 200W barrel adapter, not USB-C. The page also omitted the most important fact for anyone planning an upgrade: 16GB of its memory is soldered, and only one SO-DIMM slot is free.
The ASUS Zenbook Pro 14 OLED (UX6404) is a 14-inch creator laptop with discrete RTX graphics in a chassis the size of an ultrabook. It is upgradeable, but only partly — read the memory section before you buy modules for it.
| Component | Specification |
|---|---|
| Processor | Intel Core i9-13900H / i7-13700H / i5-13500H (13th Gen) |
| Graphics | NVIDIA GeForce RTX 4060 or RTX 4070 Laptop GPU (8GB GDDR6) |
| RAM | DDR5 — 16GB soldered onboard + 1 SO-DIMM slot |
| Max RAM | 48GB (16GB onboard + 32GB module) |
| Storage | 1 × M.2 2280 PCIe 4.0 NVMe |
| Charger | 200W barrel adapter, 20V / 10A, ø6.0mm — not USB-C |
| Ports | 2 × Thunderbolt 4 (USB-C), USB 3.2 Type-A, HDMI 2.1, SD Express card reader, audio jack |
| Display | 14.5″ 2.8K (2880×1800) 120Hz OLED touch |
| Battery | 76Wh |
Memory Upgrade Path
This is the part most listings get wrong. The UX6404 has 16GB of DDR5 soldered to the mainboard plus one SO-DIMM slot. The slot accepts a single module up to 32GB, giving a maximum of 48GB in total.
Two consequences worth understanding before you spend anything:
- You cannot remove or replace the soldered 16GB. Whatever you fit in the slot is added to it, not instead of it.
- Buy one module, not a kit. There is only one slot, so a 2 × 16GB dual-channel kit is money wasted — you would be able to fit only half of it. A single 32GB module is the upgrade that makes sense.
Recommended DDR5 SO-DIMM upgrades
| Module | Capacity | Speed | Price* |
|---|---|---|---|
| Crucial DDR5 SO-DIMM (single module) | 32GB | DDR5-4800/5600 | View on Amazon |
| Kingston Fury Impact SO-DIMM (single module) | 32GB | DDR5-5600 | View on Amazon |
| Samsung DDR5 SO-DIMM (single module) | 16GB | DDR5-4800 | View on Amazon |
Storage Expansion (M.2 NVMe)
There is one M.2 slot, PCIe 4.0 x4, taking a standard M.2 2280 drive. Adding storage means replacing the drive that is in there, not supplementing it, so size up when you do it — going straight to 2TB usually costs less than doing the job twice.
Recommended M.2 2280 SSDs
| Model | Capacity | Type | Price* |
|---|---|---|---|
| Samsung 990 PRO | 2TB | M.2 2280 NVMe Gen 4 | View on Amazon |
| WD Black SN850X | 2TB | M.2 2280 NVMe Gen 4 | View on Amazon |
| Crucial P3 Plus | 2TB | M.2 2280 NVMe Gen 4 | View on Amazon |
| SK Hynix Platinum P41 | 1TB | M.2 2280 NVMe Gen 4 | View on Amazon |
Power Delivery and Charging
The UX6404 does not use a USB-C charger as its main supply. It ships with a 200W barrel adapter (20V DC, 10A, ø6.0mm connector). A Core i9 driving an RTX 4070 needs that headroom; no USB-C Power Delivery charger on the market reaches it. Replace like for like — match both the 200W rating and the 6.0mm barrel size.
Thunderbolt 4 charging does work for light use. It will hold the machine at idle and charge it overnight, but it will not keep up while the discrete GPU is working, and the laptop will make up the shortfall from the battery.
| Charger | Wattage | Type | Price* |
|---|---|---|---|
| ASUS 200W AC adapter (ø6.0mm) | 200W | Barrel | View on Amazon |
| USB-C PD charger (light use only) | 100W | USB-C GaN | View on Amazon |
Ports and Docking
Two Thunderbolt 4 ports, so any Thunderbolt or USB-C dock will work, along with HDMI 2.1 and an SD Express reader that is genuinely fast for camera work. As above, treat dock power as a convenience rather than a replacement for the 200W brick.
Frequently Asked Questions
How much RAM can the ASUS Zenbook Pro 14 OLED (UX6404) take?
48GB — 16GB soldered onboard plus a single 32GB DDR5 SO-DIMM. The soldered portion cannot be removed.
Should I buy a dual-channel kit?
No. There is only one SO-DIMM slot, so buy a single 32GB module. Half of a 2 × 16GB kit would have nowhere to go.
How many SSD slots does it have?
One, M.2 2280 PCIe 4.0. Upgrading means replacing the existing drive.
What charger does it need?
A 200W barrel adapter (20V, 10A, ø6.0mm). USB-C charging works for light use only.
Is there a 2024 Zenbook Pro 14 OLED UX6404?
No. The UX6404 is the 2023 model and uses 13th Gen Intel processors. ASUS did not ship a Core Ultra version under this model number, so any listing pairing a UX6404 with a Core Ultra 9 185H is mistaken.
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 |
|---|---|---|
| Crucial DDR5 SO-DIMM 32GB (single module) | The right upgrade for a one-slot machine — takes it to 48GB | View on Amazon |
| Samsung 990 PRO 2TB NVMe 2280 | Only one M.2 slot, so size up in one go | View on Amazon |
| WD Black SN850X 2TB NVMe 2280 | Equally fast alternative with strong sustained writes | View on Amazon |
| ASUS 200W ø6.0mm AC adapter | Correct replacement for the original brick | View on Amazon |
Prices and availability may vary. As an Amazon Associate, we earn from qualifying purchases.
Related ASUS Upgrade Guides
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Helpful Guides
Upgrades that fit the ASUS Zenbook Pro 14 OLED
What fits: Memory: DDR5 SO-DIMM (16GB soldered on the board), 1 user slot, up to 48GB · Storage: M.2 2280 NVMe PCIe 4.0 · Charger: barrel 6.0mm 200W
Spec source: asus.com (checked 26 Sep 2026).
As an Amazon Associate we earn from qualifying purchases. Prices & availability shown on Amazon.
DDR5 SO-DIMM memory that fits
M.2 2280 NVMe SSDs that fit
*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.
