i recently updated my Graphic Card (goodbye 400$), Reinstalled Win7, all my needed Tools and noticed Salem/computer/Firefox etc.. is running sometimes really slow
when i port to boston its sometimes like this

for a long load of time usually 10-20 seconds before it loads, and usually when u have 2 chars on at the same time
i also noticed that during this time either Svchost.exe, Firefox.exe or Java.exe get really high up to 5gb Memory

i already upgraded my Computer so far he could survive WW3, and ill just post system specs from dxdiag64.

tools that usually run:
Steam
Skype
Arc (game launcher for Startrekonline etc..)
Avast Free Antivir
Malwarebytes Anti Malware
Iolo System Mechanics Professional
Firefox (including java, flash player etc.)
Salem/Java
My Harddisk (no SSD) is Defragmented and working and theres no computer problems, no viruses, no malware etc.
anyone know what it might cause?