How Do PCIe Generations Affect Storage Speeds? PCIe (Peripheral Component Interconnect Express) generations determine data transfer rates between storage devices and processors. PCIe 4.0 doubles PCIe 3.0’s bandwidth to 64 GB/s, while PCIe 5.0 doubles… Which Processor Delivers Faster Storage Speeds: Intel i5 or Ryzen 7 with PCIe 4.0/5.0?