I'm going to buy a new video card Abit Radeon R9600XT-VIO 256Mb ... and i would like to know if it's ok for video capture. I have a Sony Digital8 camrecorder. Thank you

Digital8 camcorders connect to the PC through firewire so:

if it's got a firewire port on it, then yes,
if not, then no.

You'll also need to get a firewire cable to connect the cam' to the PC as you'll probably just have been supplied with a USB cable, DO NOT use this as it's crap for video-transfer.

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P4 1GB Ram 50+160GB, Win XP, Premiere 6, Encore+Photoshop, Lite-on 4x dvd rw.
Sony TRV-250, Panasonic NVGS-75, Canon MV600i

What do u think of Pinnacle Studio AV/DV 9 (it has firewire).

You will only need the analogue capture if you plan to capture from other sources as well as your digital 8 camera, if not, then you'd probably be better off buying a much cheaper PCI firewire card which will do the same job.

I'm not sure about the Pinnacle AV/DV 9 specifically, but it's more than you need for just capturing from your camera.

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P4 1GB Ram 50+160GB, Win XP, Premiere 6, Encore+Photoshop, Lite-on 4x dvd rw.
Sony TRV-250, Panasonic NVGS-75, Canon MV600i

I have that graphics card, just buy a fire wire card also (6 quid?) works perfect, many options on the card for setting 2 monitors etc!

I have a Pinnacle Studio AV/DV 9, it works great, both input and output are high quality (thanks to a dedicated circuitry Pinnacle developped), it's the best cost-effective decision both for analog and digital camcorders.