QNAP NAS Memory Upgrade Guide - Quick tutorial on increasing your RAM
MemoryMasters 4GB Memory Upgrade for QNAP TS-451 DDR3L 1600MHz PC3L-12800 SODIMM RAM at Amazon.com
Amazon.com: QNAP TS-451+-2G-US 4-Bay Next Gen Personal Cloud NAS, Intel 2.0GHz Quad-Core CPU with Media Transcoding : Electronics
Success! Adding 2 x 8GB RAM to my TS-451+. TrueNAS is running way better with the additional RAM. 8GB was enough just for basic file sharing but it did run into issues
Memory RAM Upgrade for QNAP NAS TS-451 4GB DDR3 SODIMM | eBay
QNAP TS-451+ - Page 2 of 8 - Bjorn3D.com
Memory RAM Upgrade for QNAP NAS TS-451 8G 4GB DDR3 SODIMM | eBay