To tell you my story.
I've been using the BVision and Blizzard in the desktop for quite a while now and so far so good. Although I also did some tweaks to get it running.
1: Rewired the 5V line and attached it to the floppy connector of the computer. This because the whole lot uses lots of extra power and I read somewere that the copper lines on the motherboard might not be able to deal with this.
2: I'm not using the trapdoor and glue'd the PPC card to the frame to make it fit properly.
3: Added extra fans inside the desktop. But also made sure the air can actually get OUT of the case, othewise you're just blowing for the sake of blowing. Make sure there is airflow!
4: Made an extra hole at the back for the VGA connector to connect to. (I've got SCSI so couldn't use the hole there)
5: And ofcoz use a powerfull supply
Although I should say that I'm not using any 3D stuff alot. Can play wipeout though.
Regards,