I have a Hikvision DS7608NI-E2 NVR. (2) hikvison 4mb, (1) hikvision 3mp and (4) eyserv (dahau) 3mp cameras. Using IE11 on my I5, 8gb ram, W7 pro to view the cameras has cpu pegged at 100% the entire time. All cameras are set to max resolution, 15fps, 2048 bitrate. I am new to hi res ip cameras...