After a lot of wasted money and time, I think I've finally concluded my Raidmax Tornado case is what killed two of my motherboards in my attempted Voodoo5 build. The mounting holes are slightly closer to the expansion slots than they should be, which on the lower slots would make the blanking brackets rub the mobo. I figure either that, or some other issue with the case that I didn't notice was causing a short. Blegh.
Anyways, I've got the rig up and running sans case with a sweet Asus A7V333 I bought, and I just ordered a Coolermaster Elite 311 from Newegg to house this thing in. Not retro (neither was the Raidmax though) but I've used this case before and I adore it, it has 3.5" external bays for my floppy drive unlike a lot of new cases, has a window to show off the V5, has decent airflow (I think a 120mm front intake should be enough to tame the V5), and I got it with the orange trim to match the 3Dfx logo. Set me back some money but I just want this build to finally be done.
Also snagged myself a cheap PowerMac G3 Blue&White that doesn't have a videocard, since I have that spare Mac Rage128 from when I was building my SLI rig and didn't realize it was a Mac card. I also bought a PDS-connector ethernet card for my Mac LC550 so that I can easily put software on it without using floppies, and I'm hoping to win a Mac GeForce TI-4600 for my dual 867MHz MDD, which is the fastest card supported in OS9. It appears SquallStrife was right...
PCs, Macs, old and new... too much stuff.