Description:
Universal 32-bit PCI card/media bay combo provides front panel USB, FireWire, and card reader support to all G4 tower models (QuickSilver bezel & MDD door tab not pictured.) Perplexingly the PCI card contains neither USB nor FireWire interfaces, only hubs which require external loopback cables.
Identifying Numbers:
Sweet Multiport; PCA: 1020970-002-A; FAB: 630-1213-000 REV: B; Sweet Hub; PCA: 1020952-001-A; FAB: 630-1211-000 REV: C; Sweet Front Panel Board
Onboard logic:
NEC D720112GK 0341K3008; TI 36A4NVT TSB41LV06A; SST 39VF010 70-4C-NH 0342078-G; Genesys Logic GL816 0316MGAYP-12
PDF: Installation Guide

Description:
PowerMac G5 internal modem card provides one external 8-pin serial port in place of conventional modem. Designed to fit the original Power Mac G5's modem slot, also used on the Dual 1.8GHz variant of the subsequent June 2004 model.
Identifying Numbers:
G5 Stealth Serial Port REV:B; PCA: 1020715-002-A
Onboard logic:
NS TM23AC DS8925M

Description:
PowerMac G5 internal modem card provides one external 8-pin serial port in place of conventional modem. Designed to fit the revised Power Mac G5 modem slots (June 2004 Dual 2.0/2.5GHz, Late 2004, and Early 2005 models.)
Identifying Numbers:
G5 V2 Stealth Serial Port REV A
Onboard logic:
NS TM23AB DS8925M