The QNAP TS-251+ 2-bay NAS is a 2-bay Network Attached Storage (NAS) solution designed for home and small office environments. It combines performance, multimedia capability, and scalability with Intel’s quad-core Celeron processor, expandable memory, dual Gigabit Ethernet ports, and HDMI output for direct media playback.

Detailed Specifications

Processor & Memory

• CPU: Intel Celeron J1900 Quad-Core (up to 2.42 GHz)
• Architecture: 64-bit x86
• Memory: 2 GB or 8 GB DDR3L SO-DIMM (expandable up to 8 GB)
• Flash Memory: 512 MB

Storage & Drive Bays

• Drive Bays: 2 × 3.5″/2.5″ SATA 6 Gb/s HDD or SSD
• Maximum Capacity: Depends on installed drives (supports large-capacity HDDs)
• Hot-Swappable Drives: Yes

Network & Interface

• LAN Ports: 2 × Gigabit Ethernet RJ-45
• USB Ports: 2 × USB 3.0, 2 × USB 2.0
• HDMI Output: 1 × HDMI (Full HD 1080p)
• Buttons: Power, One-Touch Copy
• LED Indicators: Status, LAN, HDD 1–2

Performance

• Sequential Read/Write Speed: Up to 225 MB/s (with port trunking)
• Encryption: AES-256 hardware-accelerated encryption
• Virtualization Support: VMware, Citrix, Microsoft Hyper-V

Expansion & Connectivity

• Expansion Units: Compatible with UX-500P / UX-800P for capacity increase
• App Ecosystem: QTS operating system with apps for backup, streaming, and cloud sync

Power & Cooling

• Power Supply: 60 W external adapter
• Power Consumption: Approx. 18 W (typical operation), 10 W (standby)
• Cooling: 1 × 70 mm fan (smart temperature control)

Environmental Conditions

• Operating Temperature: 0 °C – 40 °C
• Humidity: 5% – 95% (non-condensing)

Key Features

• Dual-core Intel processor with AES-NI encryption engine
• Expandable memory up to 8 GB
• Dual Gigabit LAN for load balancing and failover
• 4K-ready HDMI output for multimedia applications
• Scalable storage via QNAP expansion enclosures
• Comprehensive backup, virtualization, and remote access tools

Meta Description

QNAP TS-251+ is a 2-bay NAS featuring a quad-core Intel Celeron processor, dual Gigabit LAN, HDMI output, and expandable memory up to 8 GB. Ideal for high-performance storage, multimedia streaming, and secure data backup for homes and small offices.

Datasheet