How to open ASUS Zenbook 14 OLED (UX3405) – disassembly and upgrade options

Step 1: Accessing the Internal Components

  1. Ensure the ASUS Zenbook 14 OLED (UX3405) is powered off and placed on a soft, clean surface to prevent scratches or damage.
  2. Remove the 7 Torx-head screws from the laptop’s bottom panel.
  3. Use a plastic tool to gently pop the plate at one of the top two corners, then start prying the sides before working your way around the front and the back.

Hint: Be careful during this process to avoid damaging the internal clips or the laptop casing.

Step 2: Removing the Battery

  1. Disconnect the battery by unplugging its connector from the motherboard.
  2. Unscrew the five Phillips-head screws that secure the battery to the chassis, then remove the 75Wh battery from the device.

Caution: Handle the battery and its connector with care to avoid any damage.

More info: The 75Wh battery provides up to 25 hours of web browsing, or 14 hours and 17 minutes of video playback, offering exceptional battery life for extended use.


  1. The laptop comes with soldered 32GB of LPDDR5x-5600MHz RAM, ensuring high-speed performance in dual-channel mode for efficient multitasking and future-proofing.

More info: While the memory is not upgradeable due to its soldered nature, 32GB of LPDDR5x RAM is ample for most professional and intensive computing needs.

Storage Upgrade

  1. Identify the single M.2 slot on the motherboard that supports Gen 4 SSDs.
  2. Upgrade or add a new NVMe SSD to enhance the laptop’s storage capacity or improve overall system responsiveness.

You can buy Gen 4 M.2 SSD modules here: Buy from (#CommissionsEarned)

Step 3: Examining the Cooling System

  1. Review the cooling system, which includes one large fan, a long heat pipe, two heatsinks, and a heat spreader, tailored to efficiently manage the thermal output of an iGPU-only device.

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