I recently added a spot monitor to my system and noticed that my real-time and recorded frame rate on all 8 channels have dropped to something like 2-3 f.p.s. Is this a limitation of the card? I have a high end spec on PC with Core 2 Duo Extreme, 4GB DDR2, and GeForce 8800 GTX video so doubt that is the issue. Any thoughts would be appreciated.