AMD Linux driver has received an update for PCI Express 4.0 speeds. Preparing for Vega 20 This was long speculated, but it finally materialized in a proof directly from AMD engineers working on Linux driver. The driver has been updated with PCIe gen 4.0 speeds, ultimately confirming that a new generation of a high-speed interface is being introduced to AMD Radeon graphics. Last year, long before Vega 10 was even released, we published a slide from AMD's internal presentation. So far most of the details were confirmed. The PCIe 4.0 specs were also mentioned in the slide.