When ordering a Pro Tools PC you have a choice of Firewire options depending on your requirements, first up there's the Texas Instruments chipset card which we've tested and found very compatible with most "non Avid" audio interfaces we've tried as well as firewire hard drives. We also offer the Siig Firewire card as recommended and approved by Avid as well as the Universal Audio approved card for Apollo and UAD2 devices. If you decide to go with a Thunderbolt 2 option with your Pro tools PC we'd recommend the Apple Thunderbolt to Firewire adapter as it offers the greatest bandwidth and performance for general use in our experience. You can select the Apple adapter when configuring your system.