Why Mikrotik RB951G-2HnD can cut ISP speed?

Question

Mikrotik

When connecting the cable directly to the computer, the speedtest and torrents show the speed declared by the provider (800 Mbps), but when connected to the Mikrotik, it shows 200 Mbps. And if you connect 2 computers to Mikrotik, then the speed will be the same, but only divided by two. Those. if on one computer the channel is filled with torrents, then on the other everything will be stupid and even pages on the Internet will load slowly. What could be the problem?

Answer 1

Not the fastest piece of hardware on the routerOS, it is usually recommended to enable Fasttrack, which allows packets with established status to bypass the firewall, and thereby reduce the load on the CPU and provide the desired gigabit.
PS
But with the included fastrac, you can forget the "tricks" based on the labeling of packages.

Answer 2

Because this is an old piece of iron on a weak iron. If you want high speeds from it - simplify the config

Answer 3

This model will not pull such a speed. Theoretically, the device supports up to 983 Mbps. But the key here is "theoretically". Because to fulfill this condition, it is necessary that only large frames go and the device works in Fast Path mode. And this almost never happens.
Device speed table