D80 High Speed Continuous Shooting Doesn't Work
I assume that your camera will shoot in continuous mode, but only slowly. The two main reason for this is memory buffer overload due to your memory card not being able to accept data quickly enough or insufficient battery power. When you have a slow memory card, the buffer circuit in your camera retains data until the card accepts it, but if so much data comes in so quickly that it exceeds the buffer's capacity, the camera will slow down until enough buffer space becomes available to accept more data. For example, when I first got my D90 (I use a D800 now), I tried to take video and the picture and sound would not stay in sync. with the 35 Mbs cards that were the fastest available at that time. When Sandisk developed a 45 Mbs card, I no longer had the problem. High speed cards are now available at 60 Mbs, 90 Mbs 120 Mbs and faster and those speeds will allow data to transfer from your camera's buffer so quickly that the buffer will never fill up and your camera will not slow down.
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