12 x 3.5" / 2.5" SATA III Drive Bays, 2.2 GHz AMD V1500B Quad-Core CPU, 8GB DDR4 RAM, 2 x 2.5G Ethernet Ports, 2 x PCIe 3.0 Expansion Slots, 1 x USB 3.2 Gen 1 - 3 x USB 3.2 Gen 2, RAID 0, 1, 5, 6, 10, 50, and 60, 2 RU Rackmount, RAID 0, 1, 5, 6, 10, 50, 60 & JBOD, QTS 4.4.2 Operating System Expand your network storage capacity to support backups VLANs file sharing and more with the QNAP TS-1273AU-RP-8G 12-Bay NAS Enclosure. This high-performance 2 RU rackmount network storage device includes 12 bays supporting 3.5 or 2.5 SATA III drives that can be configured in RAID 0 1 5 6 10 50 60 JBOD or Single mode. Its dual 2.5G Ethernet ports deliver reliable file transfers with compatible devices and they can be combined for 5 Gb/s speed using link aggregation. The TS-1273AU-RP-8G can achieve sequential read and write speeds of up to 542 MB/s and 591 MB/s respectively using solid-state drives in RAID 5 configuration and both Ethernet ports. This NAS also features a 2.2 GHz AMD V1500B quad-core processor with 8GB of memory to boost virtual machine performance. You can further customize performance by installing upgrade cards such as an entry-level graphics card 10G Ethernet adapter and M.2 SSD cache expansions into the two available PCIe 3.0 slots. The TS-1273AU-RP-8G has the QTS 4.4.2 operating system pre-installed and is compatible with Windows Mac Linux and Unix systems.