Good day to all.
Prompt what needs to be done to increase fps of the server?
Characteristics of the hosting servers.
Dedicated server.

1. Processor: Intel Core i7-6700 3.4 GHz
2. Memory: 64GB DDR4
3. Port: 1 Gbit/s

With 46 online, the server produces 300-400 fps.
As can be boost fps. What you need to do with the configuration of windows server and directly with the server itself.
Is there some sort of instruction or advice.
Thank you all for any help and advice.

In my opinion everything that's more than 30 FPS is fine enough and completely playable. 300 FPS is completely fine and you won't need more, especially on the server.

Check that you have power mode on
Drop here output of command "o.plugins"

Listing 16 plugins:
01 "AntiCheat" (2.2.21) by OxideBro/RustPlugin.ru (0.02s) - AntiCheat.cs
02 "Better Chat" (5.0.19) by LaserHydra (0.00s) - BetterChat.cs
03 "BetterChat Mute" (1.1.2) by LaserHydra (0.00s) - BetterChatMute.cs
04 "Better Say" (3.0.0) by LaserHydra (0.00s) - BetterSay.cs
05 "DiscordMessages" (2.1.0) by Slut (0.00s) - DiscordMessages.cs
06 "Discord Status" (1.2.0) by Tricky (0.00s) - DiscordStatus.cs
07 "EnhancedBanSystem" (5.2.3) by Reneb/Slut (0.02s) - EnhancedBanSystem.cs
08 "GameStoresRUST" (0.3.0) by HOUGAN # GAMESTORES (0.01s) - GameStoresRUST.cs
09 "Game Tip Announcements" (1.0.2) by redBDGR (0.00s) - GameTipAnnouncements.cs
10 "NoGiveNotices" (0.1.0) by Wulf/lukespragg (0.00s) - NoGiveNotices.cs
11 "PlayerAdministration" (1.3.21) by ThibmoRozier (0.00s) - PlayerAdministration.cs
12 "Rustcord" (1.5.0) by Kirollos & OuTSMoKE (0.22s) - Rustcord.cs
13 "RustySleeperFix" (0.75.103) by __red && Hougan (0.00s) - RustySleeperFix.cs
14 "ServerInfo" (0.5.3) by Fujikura/baton (0.05s) - ServerInfo.cs
15 "SmoothRestart" (1.2.5) by Fujikura/Visagalis (0.01s) - SmoothRestart.cs
16 "Wake Up" (1.0.0) by Orange (0.00s) - WakeUp.cs

I can recommend you avoid using "anti-cheats" and "fixes", because they doesnt look as real plugins that do real work

1. Disconnected, there was no difference.
2.

Lock your server FPS at 100 or something similar so the machine doesn't push its resources as hard as it can to maximize frames.

Anything over 256 is overkill and waste of resources really, so letting the server run wild won't really benefit it.

Basically the output looks good, speed is good.
As to what can further be done?
Going thru plugins one by one and fine tune them by someone who knows how.
However that is not really nec. Although you did pick up one free tip about the anti virus, he's right EAC is simply the best.

My server host recommended setting the FPS to 125 and the server is running smoothly

60 is what most game serverse target, but some go for higher around 256. I'm not sure you'd really notice a difference in most cases.

Orange

It doesnt matter how much powerful your machine is if you have 100+ unoptimized plugins...

No all my plugins are mostly developed by a friend of mine, things are solid there, just wondering what other things i can do to improve overall performance..