Unofficial TRENDnet AC2600 (TEW-827DRU v1.0R) release v18.06.5

[slh]

Bandwidth Issues on Zyxel NGB6817

For using OpenWrt, the ipq806x target isn't quite capable to route at 1 GBit/s linespeed - it should do more than 100 MBit/s (depending on your expectations for latencies probably between 350-400 MBit/s up to ~600-650 MBit/s, with software flow-offloading enabled), but 1 GBit/s is a bit above its abilities (you would need mvebu or x86_64 for that, perhaps ipq8074 in the future). Especially with 1+ GBit/s fibre connections, you're quickly leaving the prosumer space and are fairly far into enterpr…

That should answer your question, the TEW-827DRU v1.0 is based on the slightly older/ slower ipq8064 SOC, compared to the router discussed there.