So I just purchased a new US Version NVR DS-7608NIE2/8P.  When using the web browser interface and going through different menus, there is no delay and works fine.  Whenever I am on a menu where it needs to load an image from a camera, such as setting up motion, intrusion, or line detection, there is such a lag.  It takes a couple minutes to load and when it does, if you scroll up or down, it needs to refresh.  It makes it impossible to establish smart detection on a live view.  I am currently on the latest firmware 3.4.3.  
Any thoughts?
 Any thoughts?