AudioVision recommends a specific layout for the core system peripheral cards that are installed in the Power Macintosh 9500. This layout arranges the cards to take advantage of the additional cooling provided by the fan assembly and to use the PCI bus efficiently.AudioVision (PCI) slot order is:0 = Disk I/O (60 pin I/O & HD, 50pin, SCSI connectors) 1 = DSP Farm (one 60 pin I/O connector)2 = Mac Video (one Mac video connector)3 = Janus (no external connector) ribbon cabled to ABVB4 = ABVB (dual connectors) ribbon cabled to Janus5 = ATTO single channel SCSI accelerator (one 50 pin connector)