It seem like Motocross Madness, with 2x Voodoo2 12mb in SLI, in 1024x768, doesn't like the 85Hz refresh rate. Maybe it's the case with most games. So i lowered the refresh rate to 75Hz instead and it work fine.

While the games (at least Motocross Madness) still work, it will show some artifacts in menus sometimes, and strange colors on some textures, like the textures would look corrupted.

the Voodoo2 cards are: Guillemot Maxi Gamer 3D 2, and Canopus Pure3D II. (with custom longer SLI cable i made because the default one wouldn't reach both connectors). And using FastVoodoo2 4.6 drivers. Monitor is a CRT Viewsonic G70mb.

Just letting everyone know here. 75Hz work fine though.

If you want to keep your cards in original state then you are right. But if you have those coolers for voodoo2, kind of triangle shaped, forgot the name v-max or tenmax or something, then you should be safe

I remember back in the day, I desided to actively cool my voodoo's, so I bought thermal glue and put a heatsink and fanon all 3 chips and used a floppycable for sli. Lol
THere were 2 pci slots between the cards. Hahaha

the system in question is a Pentium 3 450Mhz, slot-1, with 512mb SDRAM (2 x 256mb i think, i could put more in, but it's useless), using Windows 98SE, with latest unofficial fan patches.

Though when running the game in 1024x768 at 75Hz, it's alright, no weird textures

I did a test on this system with Midtown Madness 2, in 1024x768, with similar graphics details applied, with the main video card (Radeon 7000 series AGP, 64mb i think, forgot which one but supposed to be faster than those Voodoo2 cards anyway).

Hardware 3D: slow
Hardware 3D with T&L: slower
using "FastVoodoo2 4.6" (Voodoo2 12mb SLI setup): it just run alright, little slowdowns sometimes but still playable.

Also, i changed the VGA Male-Female pass-thru cable on it, i bought those nice cables from Monoprice.com:
http://www.monoprice.com/products/product.asp?c_id=102&cp_id=10201&cs_id=1020108...

Ferrite cores, gold-plated connectors, and much more flexible, so it's much easier to leave a slot space between the 2 cards for better ventilation, and that's what i did. I have a 80mm in front and a 80mm on the back, as well as the power supply fan also on the back.

But i'm still wondering...which low-priced, quiet PCI slot blowers should i buy? some are bad quality and are just very noisy with "grinding plastic noises"

But yeah, i don't mind using 75Hz for games in 1024x768. Though Motocross Madness work fine in 800x600 in 85Hz, as well as other games (GLQuake, GLHexen2, Unreal, Unreal Tournament, Quake 2...) Eventually i'll try this computer again on my LCD monitor with those better pass-thru cables, and those Male-Male cables as well:
http://www.monoprice.com/products/product.asp?c_id=102&cp_id=10201&cs_id=1020102...

i was sick and tired of those cheap VGA cables i have around here, and there's no way i'm going to pay 40-50$ for a quality VGA cable. So that took care of the problems (for both VGA and pass-thru)