[RESOLVED] What's the fastest capture card ?

Hi Guys,

At my company we're constructing a pc for the use of videocapturing medical images such as pictures and video of a throat or nose. We currently use a IDS(germany)card, the Falcon Plus but it isn't very fast, video is choppy.
Now i'm looking for a very fast capture card too view and record images and video in real-time. Does anybody know one ? and are there benefits for using one or another ?
We're not looking for a videocard with tv-in but for a seperate capturecard
The pc we're using is a P3 1000Mhz with 256MB Rimm and running on Win98 SE.

Thanks already <img src="confused.gif" border="0">