Coolgear 1 Port PCI-e to 4 X PCI Expansion Enclosure Provides four 32-bit/33HMZ PCI Slots Fully PCI Specifications 2.3 Compliant Supports both 5V and 3.3V Fault Tolerance Option Expands 4 PCI 32-bit 33MHZ Slots over PCI Express Slot Fully Compliant with PCI Express Base Specifications, Revision 1.0a