the cameras hit a DA and then straight into the cat. No digital to analogue conversions or anything like that. Very simple setup. With it being digitized I don't even think the cameras were getting reference. with it being digitized can it really be a sync issue? The problem generally only affets one input at a time and it jumps randomly among them. As for the other question I haven't progressively gone from one input to 8 but I have used as few as maybe 4 and it has absolutely no affect on the issue. So am I to take it that you guys are NOT having this issue? If not I would really appreciate some help getting it lined out! I really don't think its a bandwidth thing on the pci bus or anything but as of yet I have not come to any conclusions and have suspected driver/buffer issues.