OneXGPU 2 eGPU with AMD RX 7800M - Portable Desktop-Class Graphics

In this review the OneXGPU 2 is assessed as a portable external GPU solution for Windows laptops and compatible handheld PCs that need a clear graphics uplift. The bottom line: it delivers a measurable performance jump thanks to the built-in AMD RX 7800M GPU, while packing extra I/O and an optional SSD bay into a compact aluminum enclosure. It is best for gamers and creators who use Thunderbolt 3/4, USB4, or OCuLink-equipped devices and want a single plug-in box to raise frame rates or drive multiple high-resolution displays.

Key Features

• Built-in RX 7800M: Provides a big performance uplift over common laptop mobile GPUs, offering around a 26% gain versus a 4070 Laptop and 50% over older RX 7600M XT in comparable workloads.
• Multiple connection options: Works with Thunderbolt 3/4, USB4, and OCuLink ports so it can link to many gaming laptops and handheld PCs with high bandwidth.
• Portable design: The aluminum alloy chassis keeps the unit light at about 1.59kg and small enough to carry with a gaming laptop or handheld.
• Expandable storage and ports: Supports up to an 8TB M.2 2280 PCIe 3.0 SSD, has a TF card slot, RJ45 ethernet and two USB-A 3.2 ports for accessories and storage.
• Flexible power modes: Default GPU TDP runs at 130W with a Turbo Button to temporarily switch to 180W for higher sustained performance.
• Included fast charger: Ships with a 300W GaN charger and a USB-C 4.0 cable, and can provide 65W laptop charging while powering the GPU.

Who It's For

The OneXGPU 2 is for Windows laptop gamers and content creators who have a Thunderbolt 3/4 or USB4 port and want a single external box to raise graphics performance, drive three displays, and add storage. It is also a good fit for handheld PCs that explicitly support USB4 or Thunderbolt and for users who value portability and integrated I/O.

It is not for MacBook users (the product is not compatible with macOS), nor is it a drop-in option for devices without the required port standard. Steam Deck owners should note it is not compatible, and some handhelds may require driver tweaks to work correctly.

Pros & Cons

Pros

• Significant GPU performance boost from the AMD RX 7800M in a portable chassis.
• Good I/O mix including HDMI 2.1, dual DP 2.0 outputs, RJ45 ethernet, USB-A ports and SSD expansion up to 8TB.
• Portable weight and included 300W GaN charger with 65W pass-through for laptop charging.
• Switchable TDP for balancing noise, thermals and peak performance via a Turbo Button.

Cons

• Not compatible with MacBook and not supported for Steam Deck, limiting cross-platform use.
• Some users report mixed installation experiences and occasional display quality complaints that may require driver attention.

Specifications

GPU	AMD RX 7800M 12GB GDDR6 RDNA 3
Default GPU TDP	130W (switchable to 180W)
Connections	Thunderbolt 3/4, USB4, OCuLink (OCuLink cable sold separately)
Video Outputs	HDMI 2.1 (4k60Hz), 2x DP 2.0 (4k120Hz)
Storage Expansion	M.2 2280 PCIe 3.0 up to 8TB; TF card slot
Included Power	300W GaN charger, USB-C 4.0 cable (3.3ft), 65W laptop pass-through
Weight & Chassis	Aluminum alloy, approx 1.59kg

Our Verdict

The OneXGPU 2 is a compelling portable eGPU for Windows laptops and select handhelds that support Thunderbolt or USB4, delivering desktop-class gains with the RX 7800M and useful extra ports in a lightweight package. It represents good value for users who need multi-display outputs, expandability, and a simple way to raise frame rates, but it is not suitable for macOS or unsupported handhelds without specific driver steps.

Frequently Asked Questions

Is OneXGPU 2 compatible with MacBook?
It is not compatible with MacBook.

Does it support hot swap?
Hot swap depends on the port: Thunderbolt 4 supports hot swap; OCuLink does not and requires the device to be off when connecting.

How do I get drivers for the RX 7800M?
Search for RX 7800M and download the Adrenalin 25.3.1 driver from AMD's website if your handheld or laptop requires it.