Minisforum MS03 Review: A Compact Workstation That Handles Gaming

Introduction

The Minisforum MS03 is a compact mini workstation that aims to deliver serious performance in a small footprint. Powered by Intel’s new Core Ultra Series 3 CPUs, this system is designed for users who need workstation-class power but want the flexibility to add a dedicated GPU. The MS03 keeps the same overall design as its predecessor, the MS02, which means existing accessories and add-ons carry over without modification.

What sets the MS03 apart is its full-size PCIe x8 5.0 slot. This opens the door to installing a low-profile single-slot graphics card, turning what could be a purely productivity-focused machine into something capable of gaming. With support for up to 128 GB of DDR5 memory and three M.2 PCIe 5.0 slots, the MS03 is built to handle demanding workloads.

Design and Build

The MS03 retains the familiar MS series form factor. The top cover slides off easily with a small button, revealing the internal layout. This design makes upgrades straightforward, and the fact that accessories designed for the MS02 fit the MS03 perfectly is a welcome touch. No modifications are needed to swap components or add new ones.

Inside, the MS03 features a full-size PCIe x8 5.0 slot. This is the key feature that makes the system stand out. While the case only supports low-profile single-slot cards, and the card must draw power solely from the PCIe slot, there are plenty of options on the market that fit this requirement. The internal layout also includes a large heat sink and a dedicated cooling fan for the M.2 array, keeping storage drives at safe temperatures even under load.

The build quality feels solid, and the tool-free access to the internals is a practical advantage for users who like to tinker. The included 240 W power supply provides enough headroom for the CPU and a modest GPU upgrade.

Ports and Connectivity

The MS03 offers a comprehensive set of ports. Up front, there is a power button, a 3.5 mm audio jack, and three full-size USB ports. Around the back, the system provides two more full-size USB 3.2 ports, a full-size HDMI port, dual USB 4 ports running at 40 gig protocol, a 10 gig Ethernet port, a 2.5 gig Ethernet port, and a dual 10 GB SFP+ interface.

This connectivity makes the MS03 well suited for network-heavy environments. The combination of 10 gig and 2.5 gig Ethernet, along with SFP+ support, covers most professional networking needs. The dual USB 4 ports also offer fast data transfer and display output options, adding to the system’s versatility.

For storage, the MS03 includes three M.2 PCIe 5.0 slots. Each slot supports up to 8 TB, and all of them can accommodate U2 Enterprise M.2 drives, allowing for up to 15 TB of total storage. A SATA adapter is also included in the box, so users can add a 2.5-inch SATA drive if needed.

Performance and Benchmarks

The MS03 is powered by Intel’s Core Ultra 9 386H processor. This chip features 16 cores and 16 threads, configured with four performance cores clocking up to 4.9 GHz, eight efficiency cores up to 3.7 GHz, and four low-power efficiency cores up to 3.5 GHz. The built-in iGPU is a four-core XC3-based unit clocking up to 2500 MHz, though it is not on par with higher-end integrated graphics options.

In Geekbench 6, the MS03 scored 2,727 in single-core and 15,323 in multi-core tests. These are solid numbers for a small form factor unit, reflecting the 16-core configuration’s ability to handle multi-threaded workloads. The system runs Windows 11 out of the box, and the BIOS offers performance settings, including quiet, balanced, and power limit modes.

For AI workloads, the MS03 benefits from the PCIe 5.0 slot. When paired with a dedicated GPU like the Intel Arc B50, the system runs at the card’s native interface speed, ensuring no performance is lost. The Arc B50, with its 16 GB of VRAM, is a capable option for AI tasks, even if it is not marketed as a gaming card.

In 3D Mark Time Spy, the MS03 with the Arc B50 achieved a total score of 8,512, with a graphics score of 7,981. These results indicate that the system is more than capable of handling modern games at 1440p.

Adding a Dedicated GPU

One of the main reasons to choose the MS03 is the ability to add a dedicated GPU. The full-size PCIe x8 5.0 slot supports low-profile single-slot cards, and the system provides enough power delivery for cards that draw power solely from the PCIe slot.

The Intel Arc B50 is a popular choice for this form factor. It offers 16 GB of VRAM and performs well at 1440p, especially with Intel’s XESS multi-frame generation technology. While the stock Arc B50 is a dual-slot card, low-profile single-slot versions are available from manufacturers like Gir. These fit the MS03’s stock cover without modification.

For users who prefer a larger card, a 3D printed lid can be used to accommodate a dual-slot GPU. This accessory, designed for the MS02 and compatible with the MS03, slides onto the top of the case and locks in place. It is a practical solution for those who want to use a more powerful card without leaving the case open.

Gaming Performance

The MS03, when paired with a dedicated GPU, delivers a satisfying gaming experience at 1440p. In Cyberpunk 2077 at 1440p high preset, the system stays above 60 fps, even during intense scenes with explosions and heavy particle effects. Enabling XESS multi-frame generation pushes performance much higher, with average frame rates well over 130 fps at ultra settings with 4x frame generation.

Forza Horizon 6 runs smoothly at 1440p high settings without any scaling, keeping the native resolution for the best visual quality. Crimson Desert is more demanding, but with XESS multi-frame generation enabled, it maintains a solid frame rate at 1440p. Using 3x frame generation provides a good balance between smoothness and visual fidelity.

Mortal Kombat 1 runs at 1440p very high settings without needing any scaling, and most fighting games should perform well on this setup. Red Dead Redemption 2 at 1440p high-ultra mix delivers strong performance without requiring upscaling, thanks to the combination of the Core Ultra 9 and the dedicated GPU.

Throughout gaming sessions, CPU temperatures remain reasonable. The mobile CPU does not approach thermal throttling, and the system stays quiet, pulling only 35 to 45 watts during gameplay. This makes the MS03 a practical choice for users who want a compact system that can handle both work and play.

Buying Advice

The Minisforum MS03 is a compelling option for users who need a compact workstation with the flexibility to add a dedicated GPU. Its full-size PCIe slot, extensive connectivity, and support for up to 128 GB of RAM make it suitable for professional workloads, AI tasks, and even gaming.

The main consideration is the GPU. The stock iGPU is not powerful enough for demanding games, so a dedicated card is recommended for gaming. Low-profile single-slot options like the Intel Arc B50 fit the stock case, while larger cards require a 3D printed lid. Users should also note that the case only supports cards that draw power from the PCIe slot.

For those who prioritize network performance, the dual 10 GB SFP+ interface and multiple Ethernet ports are standout features. The three M.2 PCIe 5.0 slots provide ample storage expansion, and the included SATA adapter adds even more flexibility.

Conclusion

The Minisforum MS03 is a solid mini workstation that delivers on its promise of performance in a small form factor. With Intel’s Core Ultra 9 386H, a full-size PCIe slot, and robust connectivity, it handles a wide range of tasks, from productivity to gaming. The ability to add a dedicated GPU makes it a versatile choice for users who want a single system for multiple purposes.

While the integrated graphics are not ideal for gaming, the PCIe slot solves that limitation. The MS03 is a well-rounded machine that should appeal to professionals, content creators, and enthusiasts who value flexibility and performance in a compact package.