QNAP TS-1253U-RP is an enterprise-grade 12-bay 2U rackmount Network Attached Storage (NAS) system powered by a quad-core Intel® Celeron® processor (2.0 GHz, up to 2.42 GHz), shipped with 4 GB DDR3L memory (maximum 8 GB), and supports 12 hot-swappable SATA 6 Gb/s drives in lockable trays.

Main specifications:

• Installed drives: 12× 4 TB Toshiba, 3.5", 7200 rpm, 128 MB cache, SATA3
• Drive bays: 12× 3.5"/2.5" SATA (hot-swap, lockable trays)
• CPU: Intel® Celeron® quad-core 2.0 GHz (burst up to 2.42 GHz)
• Memory: 4 GB DDR3L (up to 8 GB, 2× SO-DIMM)
• Networking: 4× 1 GbE RJ45
• USB ports: 4× USB 3.0
• Video output: 1× HDMI
• Power supply: 2× PSU (redundant)
• Form-factor: 2U rackmount
• Encryption: AES-256
• Performance: up to ~423 MB/s sequential read
• Hot-swap: Yes
• Noise level: ~37.5 dB(A)
• Dimensions: 89 × 482 × 534 mm