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Small black mini PC barebone with tool-less chassis

ASUS

ASUS 90MR01C1-M001D0 barebone mini PC Core Ultra 5 225 no RAM no storage

SKU CH-7S58-JGZ5T MPN 90MR01C1-M001D0

Barebone mini PC with Intel Core Ultra 5 225, dual DDR5 SO-DIMM slots up to 64 GB, two M.2 2280 PCIe Gen4x4 bays plus a 2.5" SATA bay, Wi-Fi 7, Bluetooth 5.4, 2.5 GbE LAN, dual DisplayPort 1.4.

  • ColorBlack
  • CPU TypeIntel Core Ultra 5 225
  • Memory installedNo Memory
  • Memory slot2 x 262Pin SO-DIMM
  • Max Memory Supported64GB
  • Dual Channel Memory SupportedYes
  • Intel Core Ultra 5 225 processor delivers desktop-grade performance
  • Wi-Fi 7 and Bluetooth 5.4 provide stable high-speed wireless connectivity
  • Discrete TPM 2.0 hardware protects data with encryption and authentication
  • Tool-less 1.35L chassis allows quick memory and storage upgrades
  • Up to four 4K displays supported via dual DisplayPort 1.4, USB4 and config port

Compact barebone for business desktops

The ASUS ExpertCenter PB64 is a 1.35L mini PC barebone built around the Intel Core Ultra 5 225 processor with integrated Intel Graphics. It arrives without memory or storage so IT teams can configure DDR5 SO-DIMMs and NVMe drives to match workload requirements. The platform targets office productivity, thin-client deployments and space-constrained workstations.

Upgrades from older SFF or tower PCs

The barebone replaces legacy small-form-factor desktops that lack Wi-Fi 7, Bluetooth 5.4 or 2.5Gbps LAN. The jump is worth it when a fleet needs four 4K display outputs, USB 4.0 Type-C with DP2.1 and a discrete TPM 2.0 module without adding expansion cards. Buyers who need internal 3.5-inch drive bays or discrete graphics slots should look elsewhere.

Tool-less chassis simplifies deployment

A toolless cover gives immediate access to two 262-pin SO-DIMM slots supporting 64GB dual-channel DDR5 and two M.2 2280 PCIe Gen4x4 sockets plus one 2.5-inch SATA bay. The only common pitfall is forgetting that no RAM or SSD ships in the box, so the first boot will halt until both are installed. VESA mount hardware is included for behind-monitor mounting.

Highlights

  • Intel Core Ultra 5 225 processor delivers desktop-grade performance
  • Wi-Fi 7 and Bluetooth 5.4 provide stable high-speed wireless connectivity
  • Discrete TPM 2.0 hardware protects data with encryption and authentication
  • Tool-less 1.35L chassis allows quick memory and storage upgrades
  • Up to four 4K displays supported via dual DisplayPort 1.4, USB4 and config port

Specifications

BrandASUS
Model90MR01C1-M001D0
ColorBlack
CPU TypeIntel Core Ultra 5 225
Memory installedNo Memory
Memory slot2 x 262Pin SO-DIMM
Max Memory Supported64GB
Dual Channel Memory SupportedYes
Storage InstalledNo Hard Drive
Serial ATA1 x 2.5" SATA 6Gb/s, Support 1TB~2TB 7200rpm 7mm HDD
M.2 Slot2 x M.2 2280 PCIe Gen4x4, Support 256GB~2TB NVMe™ SSD
Integrated GraphicsIntel Graphics
LANIntel i226V
Max LAN Speed2.5Gbps
WiFi GenerationWi-Fi 7
BluetoothBluetooth 5.4
Front USB1 x USB 4.0 Type-C (with DP2.1, 5V/3A, 20Gbps)
2 x USB 3.2 Gen2 Type-A (5V/0.9A, 10Gbps)
2 x USB 3.2 Gen1 Type-A (5V/0.9A, 5Gbps)
Front Audio Ports1 x Audio Jack (Line out/Mic in/Headphone out)
DisplayPort2 x DisplayPort 1.4
Rear USB1 x USB 3.2 Gen2 Type-A
1 x USB 3.2 Gen2 Type-C (PD 100W)
1 x USB 2.0
RJ451
Input19Vdc, 6.32A
Power Supply120W Power adapter
Dimensions175 x 175 x 44.2 mm
Weight1.2kg
PackagingVESA Mount & Screws / Power Adapter / US Power Cord

Questions about this item

What physical space and mount does the 1.35L chassis need?

The 1.35L case includes a VESA mount for attaching to the back of a monitor or a wall bracket; no extra rails or screws are required.

How do I install RAM and SSDs in the toolless chassis, and what step is often missed?

Slide the cover off, insert two 262-pin DDR5 SO-DIMMs and up to two M.2 2280 PCIe Gen4x4 NVMe drives, then enable dual-channel mode in BIOS — the step many skip.

Which parts will need replacement first in this barebone unit?

The CMOS battery on the motherboard and any 2.5-inch SATA hard drive you add are the only mechanical items that wear out; the CPU, Wi-Fi 7 and Bluetooth 5.4 modules are soldered.

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