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Asus ExpertCenter PN55 specifications and in-depth review

Asus ExpertCenter PN55

Manufacturer: Asus

The Asus ExpertCenter PN55 is a compact Mini PC built around a multi-core processor that balances a modest 15W TDP with a turbo clock speed reaching 5.2GHz, making it a capable desktop solution in a surprisingly small footprint. Its Micro-ATX form factor measures just 130 × 130 × 34 mm, giving it a volume of 574.6 cm³ while still accommodating a full 1TB NVMe SSD and 32GB of DDR5 memory running at 5600 MHz.

On the graphics side, the integrated Radeon 890M is based on RDNA 3.5 architecture built on a 4 nm process, delivering 3.072 TFLOPS of floating-point performance with support for DirectX 12 Ultimate, ray tracing, and up to four simultaneous displays. Connectivity options are broad, including Wi-Fi 7, Bluetooth 5.4, dual RJ45 ports, a USB 4 40Gbps port, a Thunderbolt 4 port, three USB 3.2 Gen 2 Type-A ports, two DisplayPort outputs, and an HDMI 2.1 port, with the system supporting up to 256GB of maximum RAM and carrying a one-year warranty.

Pros
  • Supports Wi-Fi 7 alongside four older Wi-Fi standards, ensuring broad wireless compatibility
  • Thunderbolt 4 and USB 4 40Gbps ports allow for high-bandwidth peripheral and display connections
  • Up to four simultaneous display outputs provide flexible multi-monitor configurations
  • DDR5 RAM running at 5600 MHz with a theoretical ceiling of 8533 MHz leaves meaningful headroom for future memory upgrades
  • The 24-thread processor with an unlocked multiplier and big.LITTLE architecture offers considerable multi-core flexibility in a 15W envelope
  • A compact 574.6 cm³ chassis fits into tight spaces while still housing a 1TB NVMe SSD and 32GB of RAM
Cons
  • No USB 3.2 Type-C ports of any generation limits compatibility with newer USB-C peripherals
  • ECC memory is not supported, which may be a drawback for workloads requiring memory error correction
  • The single HDMI 2.1 port is the only traditional display output alongside the two DisplayPorts, leaving no VGA option for legacy displays
  • Air-water cooling is absent, relying solely on the passive or fan-based thermal solution within a very compact enclosure
  • The warranty period covers only one year
  • No external memory card slot restricts quick media transfers directly from cameras or similar devices
Who is this for?

This Mini PC is well-suited to users who need a capable desktop system in a very small footprint, such as those working in space-constrained offices, home setups, or media rooms. The 24-thread processor with big.LITTLE architecture and a 15W TDP makes it a reasonable fit for everyday productivity, light content creation, and multitasking workloads, while the Radeon 890M integrated GPU with DirectX 12 Ultimate and ray tracing support opens it up to casual and light gaming scenarios. The broad connectivity suite — including Wi-Fi 7, Thunderbolt 4, and dual RJ45 ports — also makes it a practical choice for users who require versatile wired and wireless networking alongside high-bandwidth peripheral support, and the four-display output capability suits those running multi-monitor desktop environments.

Who is this NOT for?

Users with demanding graphics workloads such as 3D rendering, video production, or high-fidelity gaming will find the integrated GPU's 3.072 TFLOPS insufficient for sustained heavy loads, as there is no discrete graphics option referenced in the specifications. The absence of ECC memory support makes it unsuitable for mission-critical or error-sensitive computing environments such as scientific computing or financial data processing. Additionally, the compact thermal design without air-water cooling may limit sustained performance under prolonged heavy CPU loads, and the lack of an external memory slot makes it a poor fit for photographers or videographers who regularly need to transfer files directly from SD cards or similar media.

General info:

SSD storage capacity 1000GB
form factor Micro-ATX
release date February 2026
Is an NVMe SSD ✓
thickness 130 mm
height 34 mm
width 130 mm
volume 574.6 cm³

The Asus ExpertCenter PN55 follows a Micro-ATX form factor with dimensions of 130 mm wide, 130 mm thick, and just 34 mm tall, resulting in a total volume of 574.6 cm³. Storage is handled by a 1000GB NVMe SSD, offering fast flash-based storage within this compact chassis.

CPU:

Thermal Design Power (TDP) 15W
CPU speed 4 x 2 & 8 x 2 GHz
turbo clock speed 5.2GHz
CPU threads 24 threads
Has integrated graphics ✓
uses multithreading ✓
L3 cache 24 MB
L2 cache 12 MB
Has an unlocked multiplier ✓
Supports 64-bit ✓
CPU temperature 100 °C

The processor operates with a 15W TDP and a hybrid core configuration running at 4 × 2 GHz and 8 × 2 GHz base speeds, with a turbo clock that peaks at 5.2GHz across its 24 threads. It supports multithreading, a 64-bit instruction set, and features an unlocked multiplier, while also including integrated graphics. Cache is arranged as 12 MB of L2 and 24 MB of L3, and the CPU is rated for a maximum operating temperature of 100 °C.

Graphics card:

floating-point performance 3.072 TFLOPS
GPU clock speed 600 MHz
GPU turbo 3000 MHz
texture rate 96 GTexels/s
pixel rate 24 GPixel/s
supports ray tracing ✓
PCI Express (PCIe) version 4
texture mapping units (TMUs) 32
shading units 512
render output units (ROPs) 8
DirectX version DirectX 12 Ultimate
OpenGL version 4.6
OpenCL version 2.1
semiconductor size 4 nm
supported displays 4
has LHR ✕
Supports multi-display technology ✓
Has Double Precision Floating Point (DPFP) ✓

The integrated graphics solution delivers 3.072 TFLOPS of floating-point performance, with a base clock of 600 MHz that boosts up to 3000 MHz in turbo mode, backed by 512 shading units, 32 texture mapping units, and 8 render output units producing a texture rate of 96 GTexels/s and a pixel rate of 24 GPixel/s. It is fabricated on a 4 nm process, connects via PCIe 4, and supports DirectX 12 Ultimate, OpenGL 4.6, OpenCL 2.1, ray tracing, and Double Precision Floating Point. Multi-display output is supported across up to 4 screens simultaneously, and the GPU does not include LHR.

Memory:

RAM 32GB
RAM speed 5600 MHz
DDR memory version 5

The system is equipped with 32GB of DDR5 RAM running at a speed of 5600 MHz, providing a modern memory configuration suited to the demands of its processor and integrated graphics.

Connectivity:

Wi-Fi version Wi-Fi 6E (802.11ax), Wi-Fi 6 (802.11ax), Wi-Fi 5 (802.11ac), Wi-Fi 4 (802.11n), Wi-Fi 7 (802.11be)
supports Wi-Fi ✓
Has Bluetooth ✓
Bluetooth version 5.4
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) 0
USB 4 40Gbps ports 1
USB 4 20Gbps ports 0
USB 3.2 Gen 2x2 ports 0
USB 3.2 Gen 1 ports (USB-C) 0
Thunderbolt 4 ports 1
Thunderbolt 3 ports 0
DisplayPort outputs 2
HDMI version HDMI 2.1
HDMI ports 1
RJ45 ports 2
has a socket for a 3.5 mm audio jack ✓
has a VGA connector ✕
Has S/PDIF Out port ✕

Wireless connectivity covers Wi-Fi 7 (802.11be) along with Wi-Fi 6E, Wi-Fi 6, Wi-Fi 5, and Wi-Fi 4, complemented by Bluetooth 5.4. Wired networking is served by two RJ45 ports, while the USB layout includes one USB 2.0 port, three USB 3.2 Gen 2 Type-A ports, and one USB 4 40Gbps port, with no USB 3.2 Gen 1, Gen 2x2, or Type-C variants present. High-speed peripheral connectivity is further extended by one Thunderbolt 4 port, and display outputs consist of two DisplayPort connections and one HDMI 2.1 port. Audio is accommodated via a 3.5 mm headset jack, while there is no VGA connector and no S/PDIF output.

Benchmarks:

PassMark result 36044
PassMark result (single) 4264

In PassMark benchmarking, the processor scores 36,044 in the multi-threaded test and 4,264 in the single-threaded test, reflecting its overall multi-core throughput alongside its per-core processing capability.

Miscellaneous:

maximum memory amount 256GB
has an external memory slot ✕
GPU architecture RDNA 3.5
Has air-water cooling ✕
Supports 3D ✓
has XeSS (XMX) ✕
Type Laptop, Desktop
instruction sets MMX, F16C, FMA3, AES, AVX, AVX2, SSE 4.1, SSE 4.2
Has NX bit ✓
GPU name Radeon 890M
Supports ECC memory ✕
memory channels 2
RAM speed (max) 8533 MHz
Uses big.LITTLE technology ✓
warranty period 1 years
Uses flash storage ✕

The system uses a Radeon 890M GPU based on the RDNA 3.5 architecture and a processor classified for both laptop and desktop form factors that employs big.LITTLE technology. Memory can be configured up to 256GB across 2 channels, with a maximum supported RAM speed of 8533 MHz, though ECC memory is not supported and there is no external memory slot. The CPU supports a broad set of instruction sets including MMX, F16C, FMA3, AES, AVX, AVX2, SSE 4.1, and SSE 4.2, and includes an NX bit for hardware-level security. Stereoscopic 3D is supported, while air-water cooling, XeSS (XMX), and flash storage are not present, and the unit does not use flash storage. Air-water cooling is not included, and the product comes with a one-year warranty.

Final Verdict

The Asus ExpertCenter PN55 presents a well-rounded Mini PC option for users who want a capable desktop system without sacrificing desk space. Its 24-thread processor with big.LITTLE architecture, paired with 32GB of DDR5 RAM and a 1TB NVMe SSD, delivers a solid foundation for productivity and light creative tasks, while the Radeon 890M integrated GPU with RDNA 3.5 architecture adds meaningful graphics capability rarely found in this form factor. The extensive connectivity — spanning Wi-Fi 7, Thunderbolt 4, dual RJ45, and four-display output — further strengthens its case as a versatile compact desktop. That said, users with intensive graphics demands or a need for ECC memory will find its integrated nature limiting. Overall, the ExpertCenter PN55 is a thoughtfully specified Mini PC that suits a broad range of everyday professional and home desktop users, provided their workloads stay within the boundaries of what integrated graphics can comfortably handle.