Disclaimer: This is a reader submitted article for reference only. Be aware that any mods you do to your Mac may void its warranty. Modifications and additions should be not be performed by those not qualified to do so. You assume all responsibility for any mods you perform to your Mac.

Tywee Tan writes with the steps he performed to add a cooling fan to his 3Dfx card installed in an Apple G3 desktop chassis. The fan he used appears to be similar to the CPU cooling fans available at most electronic parts supply stores like Radio Shack. Some come already wired with a Power Supply connector. In some cases they are mounted on a CPU Heatsink, if so just remove the screws that attach the fan to the heatsink.

"1. The side wall of the G3 Desktop metal chassis next to the PCI bus is filled with ventilation holes. Using 1 small threaded bolt and 2 hex nuts (1 for tightening and the other for spacer), I mounted a slim 50 millimetre fan on the wall. The fan is positioned over the 3DFX chipset when the card is in place.

2. With the 3DFX card in place, there is still about 5 millimetre space between the chipset and the fan. In fact, I added a slim heatsink onto the chipset after the photo taking.

Please note not to mount the fan directly onto the chassis as the in-rushing air makes a whistling noise, use a spacer nut or washers to keep the fan about 3 millimetre away from the wall. The 3DFX card is speed tweaked from 50 Mhz to 60 Mhz using the 3Dfx Tweaker."

Other 3Dfx Card Coolers: Some sources of 3Dfx cooling fan kits (ready to install) are 3Dfx Cool and TennMax (see their Lasagna Cooler for 3Dfx Voodoo 1 cards). For a great cooler for Voodoo2 cards see my review of the Tennmax Stealth Voodoo2 Cooler.