I bought one a while back and have never looked back. It's a dual channel 32/64bit pci card that runs at 33MHz. This means it can run on any standard PC's PCI bus. One of the channels can take the old (50 pin) SCSI drives and CDROMs. It's LVD compatabile with a 160MB/s bus speed. It supports booting and you can flash upgrade the firmware on the card for free from adaptec's site. The cards is supported by all OS's ive tried it on. Win98 Win2K WinXP Linux FreeBSD OpenBSD SCO OpenServer Solaris-i386 Features | Product Description | Adaptec SCSI Card 19160 - storage controller - Ultra160 SCSI - PCI | | Device Type | Storage controller - plug-in card | | Interface Type | PCI | | Dimensions (WxDxH) | 6.9 in x 3.9 in | | Controller Interface Type | Ultra160 SCSI | | Data Transfer Rate | 160 MBps | | Supported Devices | Hard drive, removable media drive, CD drive, scanner | | Max Storage Devices Qty | 15 | | System Requirements | Microsoft Windows 3.x, Microsoft Windows NT 4.0, Microsoft Windows 95/98, Microsoft Windows 3.1, Microsoft Windows 2000 Professional , Microsoft DOS 6.0 or later, Microsoft Windows XP, Microsoft Windows 98 Second Edition / Windows ME, Microsoft Windows for Workgroups 3.11 | | Manufacturer Warranty | 5 years warranty | | General | | Device Type | Storage controller - plug-in card | | Interface Type | PCI | | Depth | 6.9 in | | Height | 3.9 in | | Compatibility | PC | | Storage Controller | | Controller Interface Type | Ultra160 SCSI | | Data Transfer Rate | 160 MBps | | Supported Devices | Hard drive, removable media drive, CD drive, scanner | | Max Storage Devices Qty | 15 | | Expansion / Connectivity | | Interfaces | 1 x storage - Ultra160 SCSI LVD - 68 pin HD D-Sub (HD-68) ( internal ) 1 x storage - Ultra SCSI - 50 pin IDC ( internal ) 1 x storage - Ultra SCSI - 50 pin HD D-Sub (HD-50) ( external ) | | Compatible Slots | 1 x PCI | | Miscellaneous | | MTBF | 658,151 hour(s) | | Compliant Standards | RoHS | | Software / System Requirements | | OS Required | Microsoft Windows 3.x, Microsoft Windows NT 4.0, Microsoft Windows 95/98, Microsoft Windows 3.1, Microsoft Windows 2000 Professional , Microsoft DOS 6.0 or later, Microsoft Windows XP, Microsoft Windows 98 Second Edition / Windows ME, Microsoft Windows for Workgroups 3.11 | | Manufacturer Warranty | | Service & Support | 5 years warranty | | Service & Support Details | Limited warranty - 5 years | | |