Slow wired speeds - brand new flint 3

Hey, I've bought flint 3 and I have subpar wired speeds.
When connected directly modem to PC it's about 700Mb/s.
When through flint 3 it's about 300Mb/s. I didn't change any settings, flint 3 is on newest FW, both cables are 1000Mb/s.
Rebooting with cables unplugged did not help.

Hi,

  1. Please try to change the Flint3 Ethernet 2 to WAN mode and Ethernet 1 to LAN (reverse each other) and check again.

  2. How about the speed of Flint3 wireless network?

  3. Try to enable IPv6 function of Flint3

  4. Disable hardware acceleration (I saw you mentioned in reddit, ignore this)

  5. SSH to router, and execute:

opkg update
opkg install python3-speedtest-cli
speedtest-cli
  1. Flint3 switches to AP mode, PC wired connection to LAN port, how about the wired speed of PC?