Extrem Player Join/Disconnect Lag!

Hey Guys,

we have really bad Lags while playing when someone Join or disconnect.
Maybe someone know how to fix it.

Player Join:

Player Disconnect:

My Server.cfg


hostname			
rcon_password 		
sv_password 		""
sv_region 			"3"
sv_lan 				"0"
sv_cheats 			"0"
sv_allowcslua 		"0"
sv_kickerrornum 	"0"
sv_loadingurl 		


//Logging
log 				"off"
sv_logbans 			"0"
sv_logecho 			"0"
sv_logfile 			"0" 
sv_log_onefile 		"0"


//ANTI CRASH!
sv_crazyphysics_warning 0 // Stop the console prints happening constantly
sv_crazyphysics_remove 1
sv_crazyphysics_defuse 1 // Keep this at 1 to stop potential crashes (your vehicles should still work)


//Fast Downloading Services
sv_downloadurl 
sv_allowdownload "0" // 0
sv_allowupload "0" // 0


// execute ban files
exec banned_ip.cfg 
exec banned_user.cfg 


sbox_maxsents 100


// terrortown.cfg load
exec terrortown.cfg

To my Server:

Intel Xeon E3-1270V3
HDD2x HDD 2,0 TB SATA Enterprise
RAM4x RAM DDR3 8192 MB ECC

1 Gbit/s Ethernet

Windows Server 2012 R2

HDD Test:

Srcds ressouces:

I have problems sim to yours, would be good to figure out.

I add an HDD test, hope someone can help me with this.

Ohh and i dont said that i use Windows Server 2012 R2

Remove all of your custom weapons and see if it still happens.