The AEC-6712TUM is a high performance PCI bus master Ultra SCSI-3 adapter and SCSI bus transfer rate up to 20MB/Sec.     AEC-6712TUM supports full feature PCI 32-bit bus master transfer capability including PCI enhanced data transfer commands (133MB/Sec).     AEC-6712TUM supports Scatter/Gather function to improve performance under multi-tasking OS.      Features Powerful advanced setup function Supports multi-threaded and multi-tasking Supports ACARD ASK (ACARD SCSI kernel) Built-in ATP876 32-bit RISC SCSI engine Scatter/Gather operation support Automatic FIFO threshold selection Low command overhead Burst master cycle up to 133MB/Sec (at 33MHz) Flash BIOS interface PCI Plug and Play Support SCSI-1, SCSI-2, SCSI-3 Feature Synchronous transfer rates up to 20MB/Sec Asynchronous transfer rates up to 7MB/Sec Combination commands greatly reduce interrupt handling responsibilities Removable device boot enable setup  Specification SCSI processor ATP-876 Supports 32-bit PCI bus master 20MIPs RISC processor 8-bit SCSI data bus Max. SCSI data transfer rate up to 20MB/Sec Supports 7 to 56 SCSI devices SCSI connector 8bit 50pins internal 8bit 50pins external Upgradeable flash BIOS supports Programming terminator supports OS compatibility Mac OS 8.5, OS 9.x and Mac OS X