I vaguely remember having this a long time ago, maybe because the v2's were installed manually? Try to install them using setup in the driver package, not manually adding them in device manager. Try original drivers

Try one card first and test them individually, also in 3d.

When that works try different slots, i had the most luck on the lowest pci slots with multiple sli setups. Als switching cards around can sometimes help, so make the master the slave and vice versa.
I prefer largely an identical set of cards. I know that mixed brands can work right but not every combo works.

Thing is, I had it working just fine with the existing hardware configuration before. I changed nothing - all I did was reinstall 98 and now it doesn't work. So either something broke or it's a software issue. My cards are mismatched also so the fast drivers are the only ones I can technically use. I will run some tests on games but the fact they show up in device manager makes me think the cards are not defective at least.

I had defective cards show up fine and even the 3dfx tab working, but as soon as they were deployed the screen stayed black or froze.

But if your setup only stopped working after a clean install it must be a software issue... unless you did a fresh install because of the issues?

Ok... it fixed... itself.

🙁

Maybe a bad connection? Try and clean the contacts on the cards.

Contacts look ok although one of the 2 cards looks like it's been mounted to the underside of a jeep for 5 years. Made me wonder about buying it but the seller swore up and down it worked and indeed it seems to. That's not the one I have my crossover or monitor plugged into thank god. I think the vga cable would get hepatitis.