Problems capturing with new computer

[DarkShadow]

I just upgraded my computer but can't capture decently and lose about 4 frames a second and was wondering what I may be wrong. I am using Virtualdub

Here's my computer

AMD Athlon XP 2600+ / 512mb PC2700 ram / Asus A7N8X Deluxe motherboard / Pinnacle PCTV pro capture card / 80gb secondary hard drive for capture / Win98se os

I am trying to capture 640x480 mjpeg with a 20/20 quality setting

I know the computer should be fast enough because I built another computer for another person awhile ago and it could and it was not as powerful. but could capture for an hour and oly lose 3 or 4 frames total

That computers stats

AMD Athlon XP 2100+ / 512mb PC2100 ram / Asus A7V333 motherboard / Pinnacle PCTV pro capture card / 80gb main hard drive for capture and os / Win98se os

I also notice that it takes windows 40 seconds at the loading screen but this is a clean install with the only thing loading into the system tray is the soundcards volume controls

[Dodzzz]

Make sure you have selected the correct frame rate.

If you're capturing from NTSC source, then capture at 29.97 fps, if it's PAL then select 25 fps. (change in the VirtualDub settings)

[DarkShadow]

I have that set correctly to 29.97 plus just on a side note I have been encoding for 2.5 years so any really basic things are probably not the problem

[Petco]

Upgrade your operating system to XP (ntfs). Your settings in 98 harddrive is not set on DMA direct. Installing XP doesn't have this issue, also Fat32 is limited to 4 gig captures.

[DarkShadow]

Now I feel stupid I had turned dma on in my first clean install but there where other problems then in another install I fixed the one problem and forgot dma.

As for updgrading Windows I think I will leave it because I require a fat32 partition so Linux can also use it. As for limits I just use multisegment captures and have no problems.

On a final note I love this computer I just did a test capture for 7 minutes and lost no frames. with 640x480 Uncompressed yuy2 @ 29.97 fps