This board has ICH4 - 82801DB.
From the Datasheet for ICH4:
PCI Bus Interface
— Supports PCI Revision 2.2 Specification at 33 MHz
— 133 MB/sec maximum throughput
— Supports up to six master devices on PCI
— One PCI REQ/GNT pair can be given higher arbitration priority (intended for external 1394 host controller)
— Support for 44-bit addressing on PCI using DAC
So i would magine that it is 2.2 ver compliant.