PCBuilder CUBE R5-3500 Barebone Mini PC - AMD Ryzen 5 3500, B450, DDR4 SO-DIMM, M.2 NVMe, 2.5 inch Bay, Wi-Fi 5, Gigabit Ethernet, No RAM/Storage/OS

The PCBuilder CUBE R5-3500 flips the script on compact computing: instead of a locked-down, non-upgradeable mini box, you get a true barebone platform built around a desktop-class AMD Ryzen 5 3500 processor and the versatile B450 chipset. That means you can install your own RAM, storage, and discrete graphics card to create a machine that fits your exact needs—without paying for components you don't want. The ultra-compact black chassis houses a 250W 80 PLUS Bronze power supply, so it's ready for a low-profile GPU and serious productivity.

Highlights

• AMD Ryzen 5 3500 (6 cores, 6 threads, up to 4.1 GHz) on an AM4 socket with B450 chipset
• Supports up to 64GB DDR4 SO-DIMM memory across two slots (up to 3200 MHz)
• Dual storage options: one M.2 NVMe PCIe Gen3 x4 slot and one 2.5" SATA III bay
• PCIe 3.0 x16 slot for a discrete graphics card (required, as the CPU has no integrated graphics)
• Built-in Wi-Fi 5 (802.11ac), Bluetooth 4.2, and Gigabit Ethernet for flexible networking
• Front and rear USB 3.2 Gen 1 Type-A ports for fast peripherals
• Pre-installed CPU cooler and included power cable, quick start guide, and SATA cables

In daily use

Because this is a barebone, you're in control of the final configuration. Pop in a pair of DDR4 SO-DIMMs, add an NVMe SSD for the OS, and slide in a low-profile graphics card if you need more than basic display output. The internal 250W PSU is efficient and quiet, and the compact footprint fits almost anywhere—on a desk, behind a monitor, or in a home theater setup. The front USB ports make it easy to connect flash drives or peripherals, while the rear I/O covers networking and additional USB devices. With Wi-Fi 5 and Bluetooth 4.2 on board, you can go wireless for internet and accessories, or use the Gigabit Ethernet port for a rock-solid wired connection.

Full specifications

• Product type: Barebone Mini PC
• Processor: AMD Ryzen 5 3500 (6C/6T, 3.6 GHz base, 4.1 GHz boost)
• CPU socket: AMD AM4
• Chipset: AMD B450
• Graphics: Requires discrete GPU (no integrated graphics)
• Memory: 2x DDR4 SO-DIMM slots, max 64GB, up to 3200 MHz
• Storage: 1x M.2 NVMe PCIe Gen3 x4, 1x 2.5" SATA III bay
• Operating system: Not included
• Power supply: Internal 250W 80 PLUS Bronze
• Networking: Gigabit Ethernet, Wi-Fi 5 (802.11ac), Bluetooth 4.2
• USB ports: 2x USB 3.2 Gen 1 Type-A (rear), 2x USB 2.0 Type-A (rear), 2x USB 3.2 Gen 1 Type-A (front)
• Video outputs: Dependent on installed graphics card
• Audio: Realtek ALC887 HD Audio Codec
• Expansion slots: 1x PCIe 3.0 x16, 1x M.2 E-key (Wi-Fi module)
• Cooling: Pre-installed CPU cooler
• Chassis form factor: Ultra-compact Mini PC
• Colour: Black
• Included accessories: Power cable, quick start guide, SATA data/power cables

Final note

If you want a small, efficient foundation for a custom mini PC without paying for RAM, storage, or an OS you already own, the CUBE R5-3500 delivers desktop-grade flexibility in a truly compact package.