Review of the four-bay QNAP TS-453D NAS device with 2.5GbE networking - Neowin
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
QNAP TS-453 Pro-8G NAS Administration
Qnap TS-451+ High-performance Intel quad-core NAS | IT Gears