Voodoo3 repair successful!
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I started by laying down solder mask to cover the existing exposed traces. Then I scratched out either side of the broken trace, tinned the exposed copper, then soldered a piece of 0.25mm trace overtop.
This was a PITA to try to solder. The tiny piece of copper trace I was using kept floating around in the flux. But eventually got it aligned and tacked down.
Tested with my multimeter and seemed like it had successfully bridged the broken trace.
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Booting up, it turns out this card is actually a Voodoo3 3000 according to the BIOS startup screen. I had thought it was a 2000 originally, so that was a pleasant surprise. 😁
I haven't put any solder mask on the final repair, as I'm going to test out the card some more first. It might not be completely invisible, but I don't think it looks too bad, even without the solder mask.