These are Pro Tools HD cards that I no longer use. They were used in my previous PC environment. I don't know the technical details, so I would appreciate it if someone could purchase them in their current condition. HD ACCEL is a high-performance PCI card ideal for professional music production. - Model: HD ACCEL - Connection Ports: D-sub 25-pin, 5-pin DIN - Quantity: Set of 3 - Board Type: PCI Card Thank you for looking.