sonnet echo express seiiie thunderbolt 3 edition (3-slot pcie card expansion chassis) sonnet technologies connect a high-performance graphics card or other bandwidth-hungry pcie card to a thunderbolt 3 equipped computer sonnet's egfx breakaway box, a thunderbolt 3 to pcie card expansion solution, supports any thunderbolt compatible pcie card, but is designed specifically for bandwidth-intensive graphic video cards. the breakaway box enables all the popular gpu cards that support connecting to a computer over thunderbolt such as amd radeon r9 and rx and nvidia geforce gtx7, 9 and 10 series, providing gpu support for computationally-intensive applications and games. graphic intensive gaming there's no need to carry a heavy and expensive gaming laptop to have a great gaming experience-just plug in a breakaway box and add the gpu power you want when you need it! by delivering much higher frame rates for smooth game play, the breakaway box is ideal for enabling graphic-intensive gaming on computers (such as thin/light notebooks) that otherwise would not be able to produce an acceptable gaming experience. when used with computers that properly support egpus, accelerated graphics can either be displayed on your notebook's own display panel or on external monitors. and, unlike with gaming laptops, when the next generation of gpus rolls around and you are ready for another performance boost, simply upgrade the gpu card-nobody should have to replace their computer just to keep up with the latest in gpu technology.