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GMKtec NucBox M3 Ultra specifications and in-depth review

GMKtec NucBox M3 Ultra

Manufacturer: GMKtec

The GMKtec NucBox M3 Ultra is a compact mini PC that offers a balanced combination of power and portability. It features 1000GB SSD storage for fast data access and a spacious environment for your files and applications.

Equipped with 32GB of RAM running at 3200 MHz and powered by a 6-core CPU with a maximum turbo speed of 4.7GHz, this mini PC handles multitasking and demanding workloads efficiently. It supports Wi-Fi 6 for fast wireless connectivity and features integrated Iris Xe Graphics with 96 execution units for solid graphics performance.

Pros
  • Supports up to 64GB of memory for future upgrades.
  • Equipped with Wi-Fi 6 for fast and reliable wireless connectivity.
  • Has integrated Iris Xe Graphics 96EU with 96 execution units, offering solid GPU performance for everyday tasks.
  • Comes with multiple USB ports, including USB 3.2 Gen 2 and USB-C, for flexible peripheral connectivity.
  • Supports Bluetooth 5.2 for seamless wireless device pairing.
Cons
  • Lacks an external memory slot for further expansion.
  • Does not support ECC memory, limiting its use for error-sensitive applications.
  • No Thunderbolt or DisplayPort outputs for high-bandwidth external displays or peripherals.
Who is this for?

The GMKtec NucBox M3 Ultra is well-suited for users seeking a compact and versatile mini PC for general computing tasks, office work, or media consumption. Its Wi-Fi 6 support and multiple USB ports make it ideal for environments requiring reliable connectivity and peripheral support. With its 32GB of RAM and Iris Xe Graphics 96EU, it provides a balanced performance for productivity applications, light gaming, and multitasking in a small form factor.

Who is this NOT for?

This mini PC may not be suitable for users with demanding computing needs such as high-end gaming or intensive data processing. While it offers solid integrated graphics, it lacks a dedicated GPU, making it less ideal for graphic-heavy tasks. Additionally, it does not support ECC memory or have an external memory slot, limiting its use for environments that require error-correcting memory or extensive memory expansion.

General info:

SSD storage capacity 1000GB
release date August 2025
Is an NVMe SSD ✓
thickness 106 mm
height 42.5 mm
width 114 mm
volume 513.57 cm³

The GMKtec NucBox M3 Ultra offers a substantial 1000GB SSD storage for fast data access, complemented by NVMe technology for enhanced performance. With a compact design, it measures 106 mm in thickness, 42.5 mm in height, and 114 mm in width, making it easy to fit into tight spaces. Its overall volume is 513.57 cm³, ensuring efficient use of space while maintaining impressive storage capabilities.

CPU:

Thermal Design Power (TDP) 45W
CPU speed 6 x 2.3 & 8 x 1.7 GHz
turbo clock speed 4.7GHz
CPU threads 20 threads
Has integrated graphics ✓
uses multithreading ✓
L3 cache 24 MB
L2 cache 11.5 MB
L1 cache 1200 KB
Turbo Boost version 3
clock multiplier 23
Has an unlocked multiplier ✕
Supports 64-bit ✓
CPU temperature 100 °C

The GMKtec NucBox M3 Ultra is powered by a CPU with a total clock speed of 6 cores running at 2.3 GHz and 8 cores at 1.7 GHz, reaching a turbo clock speed of up to 4.7 GHz for increased performance when needed. It supports multithreading with 20 threads, and features a large L3 cache of 24 MB for smoother processing. Additionally, it includes integrated graphics for efficient handling of visuals without a discrete GPU.

Graphics card:

GPU turbo 1400 MHz
PCI Express (PCIe) version 4
DirectX version DirectX 12
OpenGL version 4.6
OpenCL version 3
semiconductor size 10 nm
supported displays 4

The GMKtec NucBox M3 Ultra comes equipped with an integrated GPU that features a turbo clock speed of 1400 MHz, ensuring smooth graphics performance. It supports the latest DirectX 12 and OpenGL 4.6, providing excellent compatibility for modern applications and games. Additionally, it offers support for up to 4 displays, making it a versatile option for multitasking and multi-monitor setups.

Memory:

RAM 32GB
RAM speed 3200 MHz
DDR memory version 4

The GMKtec NucBox M3 Ultra is equipped with 32GB of RAM running at a fast 3200 MHz, ensuring efficient performance for multitasking and demanding applications. It uses the DDR4 memory version, providing high bandwidth and enhanced system responsiveness for a smoother user experience.

Connectivity:

Wi-Fi version Wi-Fi 6 (802.11ax), Wi-Fi 5 (802.11ac), Wi-Fi 4 (802.11n)
supports Wi-Fi ✓
Has Bluetooth ✓
Bluetooth version 5.2
USB 2.0 ports 1
USB 3.2 Gen 2 ports (USB-A) 3
USB 3.2 Gen 1 ports (USB-A) 0
USB 3.2 Gen 2 ports (USB-C) 1
USB 4 40Gbps ports 0
USB 4 20Gbps ports 0
USB 3.2 Gen 2x2 ports 0
USB 3.2 Gen 1 ports (USB-C) 0
Thunderbolt 4 ports 0
Thunderbolt 3 ports 0
DisplayPort outputs 0
HDMI ports 2
RJ45 ports 0
has a socket for a 3.5 mm audio jack ✓
has a VGA connector ✕
Has S/PDIF Out port ✕

The GMKtec NucBox M3 Ultra offers comprehensive connectivity with Wi-Fi 6 support, ensuring fast and reliable wireless performance. It also features Bluetooth 5.2 for seamless device pairing. For wired connections, the device includes two HDMI ports for video output and a selection of USB ports, including 1 USB 2.0, 3 USB 3.2 Gen 2 (USB-A), and 1 USB 3.2 Gen 2 (USB-C), enabling a variety of peripheral connections.

Benchmarks:

PassMark result 26130
PassMark result (single) 3582
Cinebench R20 (multi) result 7170
Cinebench R20 (single) result 694

The GMKtec NucBox M3 Ultra demonstrates strong benchmark performance with a PassMark score of 26130, indicating solid overall processing power. For single-threaded tasks, it achieves a PassMark single-core score of 3582, while its Cinebench R20 multi-core score is 7170, reflecting good multi-threading capabilities. In single-core performance, it scores 694 in Cinebench R20, providing a well-rounded performance for various applications.

Miscellaneous:

maximum memory amount 64GB
has an external memory slot ✕
GPU name Iris Xe Graphics 96EU
Uses big.LITTLE technology ✓
Has NX bit ✓
GPU execution units 96
Supports ECC memory ✕
memory channels 2
Type Laptop
instruction sets SSE 4.2, SSE 4.1, AVX, AES, FMA3, F16C, MMX
RAM speed (max) 5200 MHz

The GMKtec NucBox M3 Ultra supports a maximum of 64GB of memory, offering flexibility for future upgrades. It is powered by Iris Xe Graphics 96EU with 96 execution units, providing integrated GPU performance. The system features big.LITTLE technology, optimizing power efficiency, and includes two memory channels for improved data throughput. However, it does not support ECC memory, and lacks an external memory slot for further expansion.

Final Verdict

The GMKtec NucBox M3 Ultra is a compact and efficient mini PC that excels in general productivity tasks, offering reliable connectivity with Wi-Fi 6 and ample 32GB of RAM for multitasking. While its integrated Iris Xe graphics provide decent performance for everyday use, it may not be the best choice for graphics-heavy applications or intensive workloads. Overall, this mini PC is well-suited for users looking for a space-saving, versatile computing solution for office work, media, and light gaming.