Thunderbolt 2 Speeds for the 4K Era With Thunderbolt 2 technology, the interface is no longer the performance bottleneck. For the 2big, LaCie harnessed the breakthrough performance potential of the Thunderbolt 2 I/O, squeezing the absolute best speeds out of the hard disks. Add a hardware RAID controller and 7200RPM disks and the result is incredible, sustained speeds of up to 420MB/s that turbocharge file transfers and backups. With this kind of speed, videographers can edit multiple 2K uncompressed 10 bit streams or play back compressed 4K video. Digital photographers can browse a massive RAW photo library with zero lag. And, thanks to support for DisplayPort 1.2, it’s now possible to daisy chain higher resolution displays such as 4K monitors.