I'm currently using a Covid 7176 VGA to Composite/S-Video scan converter (under the chassis, its nothing more than a rebranded Focus Enhancements TView Gold). Anyway, running it from my PC with an MSI Geforce TI4200 running the latest nVidia Drivers (Forceware 61.77 on WinXP SP2) you can tweak the refresh rate output without using PowerStrip and it has finally become part of the drivers.

Now what I'm wondering, since NTSC TV is 59.94hz, what should I set my VGA output of my TI4200 to inorder to best suite a scan converter. I've tried setting the TI4200 to 59.94 and it still gets out of sync everyonce in a while and leaves a big screen tear that slowly progresses down the screen. Now it doesn't always happen during fast motion sequences, but once it starts it normally just moves down the screen and annoys the shit out of me. I don't see any screen tearing on my pc monitor tho which is set at the same 59.94hz. Since it seems not to be a video card sync issue (read: triple buffering/vsync), I'm wondering if anyone who has experience in this area knows if its better to set at a flat 60hz or what.

I'm sure what I really need is a scan converter (and an expensive one at that) that has a genlock feature to sync up, but thats out of my field and my budget ;) So if anyone has any pointers, I'd appreciate it.

Note, this happens on film, ntsc, and pal encoded materials and its random. Using the reclock plugin, PAL materials play mostly fine on my pc/tv as well, but i'm still getting the screen tearing only on the tv.