Capture - dropped frames, SATA drives, CPU fine

I'm getting dropped frames from both Digital8 & MiniDV camcorders. My
CPU doesn't seem to be spiking. I've made sure compiz is disabled and
no memory/cpu hungry apps are running. I'm using SATA drives so DMA
shouldn't be the issue.

The video and audio that is captured seems to be fine.

I'm not sure what else would be causing the problem. I would
appreciate it if someone could point me in the right direction.

Thanks!
Travis

Hardware info:

CPU - AMD 64 FX-55 Processor
Mobo -  GA-K8NXP-SLI
01:07.0 FireWire (IEEE 1394): Texas Instruments TSB12LV23 IEEE-1394 Controller
01:0a.0 FireWire (IEEE 1394): Texas Instruments TSB82AA2 IEEE-1394b
Link Layer Controller (rev 01)

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