PCIe? Gen 4 and Gen 5 connectors outperform industry-standard PCIe? 4.0 and 5.0 (Proposed) requiring higher speed performance. The optimized series supports backward mating and is footprint compatible with PCIe 3/2/1. Amphenol’s expansive range of vertical PCIe? Gen 4 and Gen 5 connectors will include options for SMT, through-hole solder, press-fit (PF), and straddle mount terminations.