Synopsys validates a PCIe 6.0 PHY inside a face-to-face 3D stack at 64 GT/s — says it got there by pulling apart an existing 2D test chip
In monolithic chips, PCIe PHYs sit at the perimeter of the die, right next to the package I/O connections, helping keep traces to the substrate short so attenuation and reflections remain manageable. A 2.5D package prese…









