QNAP TS-251D RAM 4 GB
 | Outdated Product $406.01 Mount: desktop; 3.5" slots: 2; SATA 2; SATA 3; PCI-E: 1; RAID: RAID 0; RAID 1; JBOD; additional RAID: Single; Software features: Web server; FTP server; multimedia (DLNA, iTunes, uPnP); transcoding; BitTorrent client; mail server; video surveillance server; backup; DDNS; domain integration |
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Memory expansion
QNAP TS-251D is one of the most functional two-disk NAS servers. Built on the basis of a high-performance, by the standards of NAS, dual-core Intel Celeron J4005 processor with a frequency of 2 GHz. It can be equipped with 2 GB or 4 GB of RAM, and the presence of two SO-DIMM slots allows you to expand the amount of RAM up to 8 GB. The proprietary QTS operating system is installed on the 4 gigabytes of flash memory soldered on the motherboard.
Hot swap
Supports QNAP TS-251D installation of two drives: 3.5-inch HDD, if you need maximum capacity (up to 2x16 TB), or 2.5-inch SSD, if you need high speed, especially in IOPS. Implemented the function of "hot" replacement of disks without the need to turn off the NAS. There is also a PCI-E x4 slot, in which you can install two M.2 SSDs, a Wi-Fi adapter, or a 10 Gbps Ethernet card through an adapter. By default, the NAS is equipped with a 1Gbps wired network adapter.
Video decoding
HDMI video output, as well as Intel Quick Sync hardware video decoding technology, allow the QNAP TS-251D to be used as a media player as well. All modern video codecs are supported, including H.264 AVC, H.265 HEVC and VP9 WebM, as well as 4K@60Hz TV output. Five USB ports, three of which are fast 3.2 Gen 1 (they are just 3.0), make it possible to connect all kinds of external devices (disks, smartphones, cameras) to synchronize files. There is a dedicated quick sync button on the case.
Artificial intelligence
For even greater stability, the QNAP TS-251D is cooled by a seven-centimeter fan with automatic speed control. The QTS operating system offers almost limitless networking options: FTP, web server, BitTorrent, video surveillance and more. The icing on the cake is the QuMagie artificial intelligence algorithm, which helps organize photos by faces, objects, or places.
