Samsung Galaxy Book4 Ultra — RAM, SSD & Charger Compatibility

The Samsung Galaxy Book4 Ultra is Samsung’s most powerful 16″ ultrabook, featuring an Intel Core Ultra 9 processor, discrete NVIDIA RTX 4050 or RTX 4070 GPU, and a stunning 3K AMOLED display. It’s built for creative professionals and power users who need serious performance in a slim package. Like other Galaxy Book4 models, the RAM is soldered, but the SSD is fully upgradeable, and the 100W USB-C charging provides flexibility with third-party chargers. This guide covers all upgrade and compatibility options.

RAM Compatibility & Upgrade Options

The Galaxy Book4 Ultra uses LPDDR5x memory soldered directly to the motherboard, making it non-upgradeable. Your RAM is locked in at either 16GB or 32GB depending on your purchase configuration. Given the discrete GPU and Ultra 9 processor, if you plan to do serious creative work, 32GB is the recommended choice.

The soldered design is a deliberate engineering trade-off in premium ultrabooks: it enables faster, more power-efficient memory access and allows Samsung to make the device thinner and lighter. For the target audience of the Ultra (video editors, 3D artists, developers), choosing the right RAM amount at purchase is critical since it cannot be changed later.

External Memory & GPU Considerations

While internal RAM cannot be expanded, the Thunderbolt 4 port supports external GPUs (eGPU enclosures) which can be paired with the discrete RTX 4050/4070 for additional performance in stationary work scenarios. Additionally, external Thunderbolt SSDs provide fast supplementary storage for large project files.

SSD Compatibility & Upgrades

The Galaxy Book4 Ultra features 1x M.2 2280 slot supporting PCIe Gen 4 NVMe SSDs. The SSD is fully user-upgradeable, which is excellent for professionals who frequently work with large video files, high-resolution image libraries, or complex 3D projects. You can replace it with virtually any modern PCIe 4.0 M.2 2280 drive.

Compatible M.2 2280 PCIe Gen 4 Drives

For a high-performance machine like the Ultra, premium SSDs make sense:

• Samsung 990 EVO — Excellent all-rounder, proven reliability, up to 5GB/s read speeds
• WD Black SN850X — High performance (7GB/s), outstanding thermals, the choice for demanding creative work
• SK Hynix Platinum P41 — Exceptional power efficiency, low thermals, excellent for video work
• Seagate FireCuda 530 — High capacity up to 4TB, includes built-in heatspreader
• Crucial P5 Plus — Solid balance of performance and value
• Samsung 870 QVO — High-capacity, budget option (QLC NAND)

Upgrading to 2TB or 4TB is strongly recommended for the Ultra. Creative professionals working with 4K video, RAW photography, or complex 3D files benefit enormously from larger local storage — it reduces reliance on external drives and keeps your primary workflows fast.

SSD Upgrade Instructions

Remove the single screw accessing the M.2 slot cover, pull the existing drive out at 45 degrees, insert the new drive, and secure it with the screw. No software installation or drivers are required on Windows 11 Pro (which the Ultra ships with). The system recognises the new drive instantly.

Charger & Power Bank Compatibility

The Galaxy Book4 Ultra supports USB-C Power Delivery at 100W, which is exceptional flexibility. This 100W rating means you can use a wide range of third-party chargers, power banks, and multi-port charging solutions. The included Samsung 100W charger is excellent, but you have many alternatives.

Compatible USB-C PD Chargers (100W)

Anker 747 Charger (140W) — Overkill wattage ensures ultra-fast charging. Three USB ports let you charge the Ultra plus two additional devices simultaneously. Compact and travel-friendly despite the high power output.

Baseus 100W Charger — Exact match for your laptop’s charging spec. Multiple USB-C and USB-A ports for simultaneous accessory charging. Great for desk setups.

Lenovo ThinkPad 140W Charger — Excellent cross-brand option, high power output, reliable across devices.

High-Capacity USB-C Power Banks

For travel, consider a high-capacity USB-C power bank with 100W+ output capability. The Anker 737 Power Bank (25,000mAh) or Baseus 100W options provide emergency top-ups for long flights or field work. While they won’t charge the RTX 4070 fully depleted, they provide useful runtime extension in a pinch.

Docking Station & Thunderbolt 4 Accessories

The Galaxy Book4 Ultra features Thunderbolt 4 connectivity, which is essential for professional creative workflows. Thunderbolt 4 enables:

• Full-featured docking stations with multiple Thunderbolt and USB ports
• External GPU (eGPU) support for additional graphics power
• Daisy-chaining of multiple high-speed Thunderbolt devices
• Power delivery up to 100W back to the laptop
• Dual 6K monitor support or quad 4K displays
• External Thunderbolt SSDs for project file workflows

Recommended Thunderbolt 4 Docks

For creative professionals using the Ultra as their primary machine, quality Thunderbolt 4 docks from Caldigit, OWC, and ASUS are worthwhile investments. The Caldigit TS4 and OWC Thunderbolt 4 Dock both provide robust port options and excellent build quality.

If you work primarily at a desk with external monitors and storage, a Thunderbolt 4 dock consolidates your peripherals into a single connection, turning setup/teardown into a simple one-cable operation.

Galaxy Book4 Ultra Specifications Table

Frequently Asked Questions

Can I upgrade the RAM in the Galaxy Book4 Ultra?

No. The LPDDR5x RAM is soldered to the motherboard and cannot be upgraded or removed. You must choose 16GB or 32GB at purchase time. For video editing, 3D work, and professional creative tasks, 32GB is strongly recommended.

What SSD upgrades are compatible with the Ultra?

Any M.2 2280 PCIe Gen 4 NVMe SSD is compatible. For a high-performance machine like the Ultra, WD Black SN850X, Samsung 990 EVO, and SK Hynix Platinum P41 are excellent choices. Upgrading to 2TB or 4TB is recommended for creative workflows.

Can I use third-party USB-C chargers with the Galaxy Book4 Ultra?

Yes. Any USB-C PD charger rated 100W or higher is compatible. Anker 747, Baseus 100W, and Lenovo ThinkPad chargers all work perfectly. The laptop will still charge (slowly) with lower-wattage chargers, but 100W+ is recommended.

Does the Galaxy Book4 Ultra support external GPUs?

Yes. The Thunderbolt 4 port supports external GPU (eGPU) enclosures, allowing you to add additional graphics power for demanding 3D rendering or video processing tasks. The RTX 4070 and eGPU can work together for significant performance boosts.

What docking stations work with the Ultra?

Any Thunderbolt 4 dock is fully compatible. Caldigit TS4, OWC Thunderbolt 4 Dock, and ASUS docks all work excellently. For creative professionals, a Thunderbolt dock with high port density and full 100W power passthrough is ideal for desk setups.

Recommended Products

These are the products we recommend based on this guide. All links go to Amazon UK where you can check current prices and availability.

Prices and availability may vary. As an Amazon Associate, we earn from qualifying purchases.

Related Guides

• Samsung Galaxy Book Upgrades
• Samsung Galaxy Book Series Upgrade Guide
• Ram Compatibility
• Ssd Compatibility
• Charger Compatibility