4GB Memory for QNAP TS-463U-RP DDR3L 1600MHz PC3L-12800 SODIMM RAM (PARTS-QUICK Brand) at Amazon.com
User manual HGST TS-453U-RP (English - 344 pages)
QNAP TS-463U-RP-4G 4-Bay Turbo NAS
QNAP launches TS-x63U series NAS - NotebookCheck.net News
TS-464U-RP | Intel® quad-core rackmount NAS with dual-port 2.5GbE and PCIe expandability for high-speed transmission and virtualization applications | QNAP (US)